Sunday, August 30, 2009

Kamut Crackers


Kamut® Norba Farvento Rio Forenza
1000 Seeds weight (gm) 71 54.8 45.2 30.1 44.4
Protein (%) 16.4 14.3 17.7 16.6 18.4
Dry Gluten 15.5 12.5 14 13.4 17.1
Dry Gluten/Protein 94.5 87.5 79 80.6 93
Ash (%) 2.13 1.86 2.07 1.95 2.62
K (mg/100g) 490.8 471.8 429.1 472.2 646.2
Mg (mg/100g) 111.81 83.26 114.21 96.3 129.24
Na (mg/100g) 5.98 9.88 9.82 8 7.74
Ca (mg/100g) 16.57 22.04 22.61 22.48 23.26
Fe (mg/100g) 2.88 3.64 3.83 2.86 3.86
P (mg/100g) 445 382.1 421.7 379.2 531.9
Se (mg/100g) 0.01 0 0.01 0 0
Β-carotene (ppm) 5.97 5.4 3.03 4.07 4.95
Yellow Index 19.16 16.85 13.76 10.58 10.1
Brown Index 18.96 19.28 21.47 13.13 15.74


The basic recipe

  • 500 gm water (50% AR)
  • 150 gm virgin olive oil
  • 7 gm yeast





















Saturday, June 27, 2009

Digital Television -- Analog Tomatoes

Television channels converted to all digital transmission on June 12, 2009. In Puerto Rico the public reaction was similar to the coming of hurricanes: buy everything in your local electronic shop (even if it is not applicable to your problem). Even though the digital conversion had been announced for over 24 months, delayed since February, and published in every newspaper, the month of June entered with no converter boxes or antennas on the island.

Wanting to see the new world of digital television, the option was to go to Home Depot and build a quick Koch fractal antenna. It is amazing what you can do with 6 feet of 0.25" aluminum rod, an 11x14 sheet of Lexan, and some nuts. The Koch antenna is tuned to channel 26 (526 MHz), near the geometric mean of the channels available in San Juan


Bending and building the fractal


15 channels for ~$10


Analog Tomatoes

The harvest from Siembra Tres Vidas was composed of mainly beautiful tomatoes: beefsteak, Roma, and heirloom. Since eating 3 kg of tomatoes a week is a challenge, the goal was to create dried tomatoes that could be used in the place of sun dried.

In the analog world, tomatoes are dried on racks, mainly in Turkey, China, Brazil and the Central Valley of California. Drying tomatoes in the tropics is a little more difficult, mostly due to the high environmental humidity. Vegetables usually begin to mold before they dry.

A solution is hot air drying. However, high temperatures can affect color. Since we do not have a dehydrator in Puerto Rico, the next best option is a convection oven set to its lowest temperature, in our case 80C. Since large amounts of water can be trapped inside the tomato cell structure, salting the tomatoes can bring this water to the surface where it can be evaporated.

Start by rinsing the tomatoes and removing stems.



Beautiful mountain grown tomatoes


Cleaned and stemmed

Following washing, the tomatoes are sliced into eighths and spread on pizza racks of varying diameter. Salt was sprinkled on the cut tomatoes to extract water. It was assumed that the osmosis would continuously replenish the water lost to evaporation. The remaining salt would serve as seasoning and a preservative. Based on area, the tomatoes were salted to about 6mg salt per cm2.


Types of pizza racks used for drying; area exposed, and salt used.
Tray 1 will be a 'try rack' to test for weight loss during drying.

Tray Diameter (cm) Area (sq cm) Salt (gm) Screen Weight (gm) Salt mg/cm2
1 19 283.53
52
2 30 706.86


3 35 962.11 6
6.24
4 40 1256.64 8
6.37
5 45 1590.43 10
6.29


Part of the recipe was to test how long and how quickly the tomatoes lost weight during drying. To test the weight loss (assumed to be water loss), a small pizza rack was designated a 'try plate'. This small 'try plate' could be removed at regular intervals and weighed. As discussed above, the try rack weighed 52 grams.



The small plate at right is the test rack


...and it weighs 342 grams at the start of drying

3.6 kg of tomatoes were cut, placed on racks, salted, then placed in the oven set to 80C convection baking. The oven door interlock was bypassed to allow hot air and water vapor to escape


Loaded racks--the 'try rack' is on the middle rack, right side

Water evaporates slowly at 80C; however, the color of the fruit is maintained. Drying to 89% weight loss took approximately 7 hours:

Time Weight Net Tomatoes % reduction
00:00 342 290 0%
01:48 247 195 33%

176 124 57%
04:13 145 93 68%
05:28 111 59 80%
06:28 93 41 86%
07:18 83 31 89%


After 4 hours, tomatoes are shrinking



After 6, the water around the seeds is also evaporating

After 7 hours, the 3.6 kg of tomatoes was down to about 400 grams. Color was excellent, and the light salt gave the tomatoes an excellent taste. (Further note: dipping the tomatoes in flavored salt or smoke would be even more interesting. The liquid smoke extract can also act as a bacteriostat, due to the phenolic compounds in the smoke.)




Summary:
  • Starting weight of tomatoes: 3600 grams
  • Ending weight : 396 grams
  • Water evaporated: 3204 gram (3.2 kg)
  • Energy required to evaporate at 2.26kJ/kg = 7068 kJ = 1.96 kWH
  • Electricity used in convection oven at 50% cycle for 7 hours= 9 kW
  • Overall efficiency = 1.96/9 = 22%

Digital Drying



Sunday, May 31, 2009

Salsa di pomodori piccante




Fresh, naturally grown ingredients

The tomatoes are coming in for summer from our favorite natural grower, Siembra Tres Vidas. Since I will be off the island for a week, the best way of preserving all of these fresh tomatoes is making a reference sauce for pasta. The idea for this sauce comes from Haiti, where the hot peppers 'come to visit', but do not stay.

Ingredients

  • 1 kg fresh tomatoes, coarsely cubed
  • 250 gm fresh onions, medium dice (5mm)
  • 30 gm fresh garlic, diced
  • 100 gm natural grown aji dulce (variant Cubanelle Pepper), medium dice
  • OPTIONAL BUT ESSENTIAL: two (2) very fresh habañero peppers ~15 gm, deveined and seeded. Keep the habañeros in large pieces. (use gloves or get used to it--try to do the deveining under running water. Do not touch eyes after handling!)
  • 75 gm virgin olive oil
  • 320 cc red, substandard pineapple wine (12% alcohol, fruity)
  • 10 gm salt (approximately 1% of tomato weight)
  • 30 gm white sugar

Total weight of ingredients: 1815 gm



Procedure


A good dice of onions, garlic and aji dulce


Using a covered cazuela (terracotta cooking utensil), heat the olive oil with the habañero chiles until the chiles begin to fry. Continue to fry slowly, turning the peppers until their original orange color is browned. Do not fry too far or the result will be bitter. Remove the habañeros from the cazuela, carefully draining any oil on the habañeros back into the cazuela.


Habañeros before and after frying in virgin olive oil.
Keep the pieces big. You should recover them. Lost habañero pieces are dangerous.

What happened: Capsaicin, the active ingredient in hot peppers, is oil soluble. Frying the peppers extracts the capsaicinoids making the olive oil (very spicy). Browning the peppers gives a caramel, complex flavor to the finished oil.

Add the onions, chopped aji dulce, and garlic, and sautee until transparent. Then add the tomatoes and 10 gm of salt. Allow the tomatoes to stew at low heat on the stovetop until they have begun to become watery. Add the wine. Place the cazuela in a convection oven at 110C (slightly above the boiling point) and allow to cook covered for 6 hours.

At the end of this cooking period, the tomatoes will have fully integrated into the sauce. There should be skins floating in the mixture


Sauteeing the onions and garlic on low heat, then add the chopped tomatoes

What happened: The low cooking temperature assures that the volatile aromas of the fresh tomatoes is not lost. Please see the Pflug papers here.


At end of first cooking

Pass the cooked sauce through a medium food mill to retain some interesting texture. Then add (as in the instructions of Marcus Gavius Apicius) oregano leaves to taste and 30 grams of sugar. Stir into the sauce. Finish by cooking covered at 80C for 4 hours.


Food Mill


The finished, earth red, concentrated sauce


If you did not add the habañeros, add freshly sliced basil at the end of the final cooking. Basil is a very delicate herb and you do not want to cook it very long.

The finished sauce is aromatic with very complex flavors on the palate. It begins with a nose of oregano, then to the tart of the tomatoes, moving lightly to sweet, and finishes with a mild, fruity heat.

Total yield after evaporation: 500gm (27.8% of original materials)

Saturday, May 16, 2009

Dulce de Leche--And the weekly bread

Milk and Honey are the only articles of diet whose sole purpose is food.

-University of California Food Sciences Department

Think about that.


A long time--

In all the world, these are the only two things uniquely intended to continue the life-cycle without interrupting any other life-cycle.

Now think about mixing them together.

www.cowparade.com
Cooking with milk is prehistoric. Exodus (34:26) exhorts the Israelites not to "boil a kid in its mother's milk" hinting that milk as an ingredient was used well before the scholars codified the law. (Truly, Talmudic scholars do not fully understand this prohibition, whose discussion continues today.) In spite of the Talmudic prohibition, raw milk is a fickle ingredient for cooking. It comes fresh from the cow with all of the micro-organisms to make cheese, or yoghurt, or butter, or kefir, or be fermented into kumiss. Cooking it 'cauldron-of-hell' style on an open fire led invariably to boil-overs and a less than fresh tasting result. All of this changed when sugar was available, either as hard-to-collect honey or as cheap cane sugar from the Indes.

When this happened, the delicacy joined a new word that was just coming into being, first in Catalonia, then throughout the Spanish world: manjar. Catalonia's richest city, Barcelona, was port city to the western Mediterranean. Food chosen for a voyage into Barcelona had to be profitable for the merchant. It would be rare and expensive. The merchants labeled new foods with their place of origin "menjar dels Árabes" or "menjar dels Muslmanes", using the Latin root menducar, meaning to chew (it later became mangiare=EAT!). Thus, the signs only said: "This is what the Arabs eat". In an early bow for consumer marketing, the purchasers soon came to associate menjar with 'delicacy'. However, around this time, manjar became associated with another delicacy: Manjar de los ángeles, the food of the angels. Its ingredients: boiled milk and honey.

The only Latin Americans who feel they are on equal (or maybe a bit superior) to angels are the Argentines, and notably they are one of the few countries that truly follow the most natural practice of making manjar de los ángeles, or dulce de leche. The recipe allows fresh, unpasteurized milk. There is no corn flour (Cuba), dark caramel (Colombia), or mixing of goat and cow milk (Mexico). The recipe is a national standard that is available for your personal download and printing. This clever use by the Argentine government of the Internet to virtually publish useful information saves immense amounts of time in the government's printing office, thereby allowing it to physically print virtually worthless bonds.

Using fresh milk available from our favorite natural grower, Siembra Tres Vidas, we used this modified Argentine recipe

  • 100 units fresh milk
  • 24 units cane sugar (modified upwards from 20 parts. See discussion.)
  • 1 units invert sugar syrup (modified downwards from 4 parts.)
  • 0.05 sodium bicarbonate (speed Maillard reaction)
  • 0.06 vanilla
Even though I had sufficient invert syrup to meet the original recipe, it was a dark syrup. As this was the first calibration run, I wanted to observe the natural color changes as the milk evaporated. Later runs should use more invert sugar to prevent crystallization.

Comverting the ratios as follows:
  • 1 liter milk (1000 gm)
  • 240 gm white sugar (Snow White--still packed in Puerto Rico and the original sugar made by Serallés...)
  • 0.5 gram sodium bicarbonate (Baking Soda)
  • 1/2 a Dominican vanilla bean (see more of the story below)
Set the milk in a 3-liter double boiler and allow to reach its maximum temperature. This will normally not exceed 95C. When the milk reaches 95C, add the 240 grams of sugar and weigh the total pan. At this point you have 1000 gm of milk and 240 gm of sugar for a total weight of 1240 grams. Dulce de Leche is a condensation process that needs to proceed until the remaining dulce is at least 70% solids (70 on the Brix scale). If you have a honey refractometer, you do not need to weigh the pan and compute the evaporation.


Weigh the milk and heat to the steam temperature (~92C) then add sugar

When you start, you will have

  • 240 grams of sugar
  • About 11.5% solids in the whole milk (sugars, fats and proteins) = 115 gm
This means about 355 grams of solids that should be about 70% of the total weight. This means a final weight of dulce de leche when done of 500 gm, or half the original milk weight.

After one hour of cooking, about 30% of the water will have evaporated. At this point, add the bicarbonate of soda. A good amount of fizzing will occur, indicating acids are being reduced. The reduction of acids allows a much more rapid browning of milk proteins, without having to raise the temperature to the 'cauldron of hell' stage.


Add baking soda (NaHCO3) and watch the fizz

Now it becomes a game of patience. Keep gently stirring the milk and sugar every 10-15 minutes. Using steam as the cooking medium eliminates the possibility of milk proteins of coagulating and creating lumps in the finished dulce.

After about 40% of the liquid has been evaporated (45 Brix), add essence of vanilla, or in this case, one-half of a natural vanilla bean from the island of Dominica. (You buy these well away from the tourist track in Saint Thomas from a nice lady who can also turn your son into a goat.) Fresh picked vanilla beans have such an aroma that the entire kitchen turns into a candy reverie.


The nice lady in Saint Thomas who sells natural vanilla beans from abandoned plantations in Dominica

Keep stirring, and finally add the invert syrup when solids are reaching 65-70%. Invert syrup is composed of glucose and fructose that will disrupt crystallization of the pure cane sugar. See here.

For this batch, I computed a target weight of pan and dulce of approximately 1240 grams. This point represented where the solids would be 75-80%. Again, there is a good deal of estimation in this. It is best to use a refractometer.



Stir frequently and keep the steam jacket filled


Look closely at the color change in the last 30 cc of evaporation. This happens in 15-20 minutes in a steam pan. Be careful!

The progression of the dulce is shown below. Overall time is about 4 hours to make about 500 grams in a test batch.


Weight in pan (gm) Estimated % solids Temperature C Notes Time
1000 11.50% 20 Fresh Milk
1240 28.63% 90 Add sugar 11:34:00 AM
901 40.62% 92 Add bicarbonate-fizzing 12:27:00 PM
793 46.15% 92
12:52:00 PM
687 53.28% 92 Dropped Thermometer in tank 01:26:00 PM
613 61.34%
Added invert syrup 01:48:00 PM
560 67.14%

02:04:00 PM
525 71.62%

02:21:00 PM
506 74.31%

02:31:00 PM
486 77.37%

02:58:00 PM
476 78.99%

03:10:00 PM
468 80.34% 91
Repaired thermometer
03:24:00 PM





The finished dulce de leche while at 60C. At this temperature it is still fluid; as it cools it became nearly solid.
Excellent in an Italian espresso for an adult velvet sugar bomb. Or pour on vanilla ice cream. Or spread on bread, which reminds me...



The weekly bread

This would be a biga based bread in two sub-batches. The intent was to split the original biga, making it the 'mother' of two 2.4 kg batches. Splitting the batches permitted pacing the dough to the makeup bench and the single oven. Having only one oven means that bread near the end of a batch is over-risen and usually good for pizza.

The biga was a 55% AR dough:

  • 450 gm of WW flour
  • 550 gm of Amapola Harina por Pan
  • 8 gm of Fleischman's IDY yeast dissolved in
  • 600 gm of water at 40C with
  • 10 gm of invert syrup
This was allowed to ferment overnight for 13 hours. Then the resulting ~1.55 kg biga was divided in two.

Mixing and rising

The final dough was made to a 60% AR recipe in a 2.4 kg batch. Per batch:

  • Final total flour: 1.5 kg (the biga already has 500 gm)
  • Final total water: 900 gm (the biga already has 275 gm)
  • Salt per batch: 30 gm (2% of flour weight)

To make the total weight, add the biga to an additional 625 gm of water and 30 gm of salt and mix on first speed until the biga (and its yeast) are liquefied. Then add the additional 1 kg of flour and mix for 7 minutes on first speed.

Take the finished dough, round it on the bench, and place in a 6-8 quart sealed tub for first rising.


The biga after 13 hours. Very firm yet yeasted.


Dough after first mixing, then after first rising (1-hr @ 35C--sunny)


The second batch was prepared in the same way, but one hour behind the first. This allows one to rise while the second is still in preparation.

Allow to rise 1+ hr, then knock down and allow to rise another 30 minutes before forming

Forming and Baking

The batches divided into 100 gm rolls and 400 gm small loaves.

  • Divide dough and form boules. Allow to rest 20 minutes at about 27C.
  • Bench boules into Kaiser knots and pistolet rolls, let rest 10 minutes.
  • Bench loaves into mid-length loaves, not baguette. Let rise 30 minutes on flat.
The rolls were baked at 225C for 14 minutes. The loaves were baked for 20 minutes at 225C, then allowed to cool on the hot baking stones to improve the crust.


100gm divisions, ready for rounding



12 pistolet, 12 Kaiser knots, 6 loaves