Tempeh
|
Fresh tempeh at the market, Jakarta, Indonesia. Traditionally tempeh is wrapped in banana leaves. |
Tempeh (/ˈtɛm.peɪ/), or
tempe (
Indonesian), is a traditional soy product originally from Indonesia. It is made by a natural culturing and controlled
fermentation process that binds
soybeans into a cake form, similar to a very firm vegetarian burger patty. Tempeh is unique among major traditional soy foods in that it is the only one that did not originate in the
Sinosphere.
It originated in today's
Indonesia, and is especially popular on the
island of
Java, where it is a
staple source of protein. Like
tofu, tempeh is made from soybeans, but tempeh is a whole soybean product with different
nutritional characteristics and textural qualities.
[1] Tempeh's fermentation process and its retention of the whole
bean give it a higher content of
protein,
dietary fiber, and
vitamins. It has a firm
texture and an earthy
flavor which becomes more pronounced as the tempeh ages.
[2][3] Because of its nutritional value, tempeh is used worldwide in
vegetarian cuisine; some consider it to be a
meat analogue.
Production
|
Sliced tempeh |
Tempeh begins with whole soybeans, which are softened by soaking and dehulled, then partly cooked. Specialty tempehs may be made from other types of
beans,
wheat, or may include a mixture of beans and
whole grains.
A mild
acidulent, usually
vinegar, may be added in order to lower the pH and create a selective environment that favors the growth of the tempeh mold over competitors. A
fermentation starter containing the spores of
fungus Rhizopus oligosporus is mixed in. The beans are spread into a thin layer and are allowed to ferment for 24 to 36 hours at a temperature around 30 °
C (86 °
F). In good tempeh, the beans are knitted together by a mat of white
mycelia.
Under conditions of lower temperature, or higher ventilation, gray or black patches of
spores may form on the surface—this is not harmful, and should not affect the flavor or quality of the tempeh.
[citation needed] This sporulation is normal on fully mature tempeh. A mild
ammonia smell may accompany good tempeh as it ferments, but it should not be overpowering. In Indonesia, ripe tempeh (two or more days old) is considered a delicacy.
Nutrition
The soy
protein in tempeh becomes more digestible as a result of the fermentation process. In particular, the
oligosaccharides that are associated with gas and
indigestion are greatly reduced by the
Rhizopus culture. In traditional tempeh making shops, the starter culture often contains beneficial bacteria that produce vitamins such as
B12[4][5] (though it is uncertain whether this B12 is always present and
bio-available).
[6] In western countries, it is more common to use a pure culture containing only
Rhizopus oligosporus which makes very little B12 and could be missing
Klebsiella pneumoniae which has been shown to produce significant levels of B12 analogs in tempeh when present. Whether these analogs are true, bio-available B12, hasn't been thoroughly studied yet.
[7]
Preparation
|
Battered and fried tempeh |
|
Tempe mendoan |
In the kitchen, tempeh is often prepared by cutting it into pieces, soaking in
brine or
salty sauce, and then
frying. Cooked tempeh can be eaten alone, or used in chili, stir frys, soups, salads, sandwiches, and stews. Tempeh has a complex flavor that has been described as nutty, meaty, and mushroom-like. Tempeh freezes well, and is now commonly available in many western supermarkets as well as in ethnic markets and health food stores. Tempeh performs well in a cheese grater, after which it may be used in the place of ground beef (as in tacos). When thin sliced and deep fried in oil, tempeh obtains a crispy golden crust while maintaining a soft interior—its sponge-like consistency make it suitable for marinades. Dried tempeh (whether cooked or raw) provides an excellent stew base for backpackers.
Types
Name | Description |
tempe bacem | tempeh boiled with spices and palm sugar, and then fried for a few minutes to enhance the taste. The result is damp, spicy, sweet and dark-colored tempeh. |
tempe bongkrèk | made from or with coconut press cake (see below) |
tempe bosok (busuk) | rotten tempeh, used in small amounts as a flavoring |
tempe gembus | made from okara |
tempe gódhóng | tempeh wrapped in banana leaves |
tempe goreng | deep-fried tempeh |
tempe mendoan | thinly sliced tempeh, battered and deep fried quickly resulting in limp texture |
tempe kedelai | simply tempeh, made from soybeans |
tempe kering | raw tempeh cut into little sticks, deep fried then mixed with spices and sugar, often mixed with separately fried peanuts and anchovies (ikan teri), this can be stored up to a month if cooked properly. |
tempe murni | tempeh made in plastic wrap without any additives such as grated raw papaya (lit. pure soybean cake) |
tempe oncom | also onchom; made from peanut press cake; orange color; Neurospora sitophila |
A new form of tempeh based on
barley and
oats instead of soya was developed by scientists at the Swedish Department of Food Science in 2008. It can be produced in climate regions where it is not possible to grow soya beans.
[8]
Tempe bongkrèk
Tempe bongkrèk is a variety of tempeh from Central
Java, notably
Banyumas regency, that is prepared with
coconut. This type of tempeh occasionally gets contaminated with the bacterium
Burkholderia gladioli, and the unwanted organism produces toxins (
Bongkrek acid and
toxoflavin) from the coconut, besides killing off the
Rhizopus fungus due to the
antibiotic activity of bongkrek acid.
Fatalities from contaminated tempe bongkrèk were once common in the area where it was produced.
[citation needed] Thus, the sale of tempeh bongkrèk is prohibited by law nowadays; clandestine manufacture continues, however, due to the popular flavor. The problem of contamination is not encountered with bean or grain tempeh, which have a different composition of
fatty acids that is not favorable for the growth of
B. gladioli but encourages growth of
Rhizopus instead. When bean or grain tempeh has the proper color, texture and smell, it is a very strong indication that the product is safe. Tempe bongkrèk which is yellow is always highly toxic due to toxoflavin, but tempe bongkrèk with a normal coloration may still contain lethal amounts of bongkrek acid.
Tempe mendoan
A variation of tempeh cooking method, often found in
Purwokerto. The origin of the word
mendoan is from
Banyumas regional
dialect, which means "to cook instantly in very hot oil", that results in semi-raw cooking
[clarification needed] and soft texture. The tempeh is dipped into spiced flour dressing before frying it in hot oil for a short time. Tempe Mendoan may seem like half-cooked soft fried tempeh, unlike common crispy fully deep fried tempeh.
References)
- ^ Shurtleff, William; Aoyagi, Akiko (2001). The Book of Tempeh. Soyinfo Center. pp. 8. ISBN 1580083358, 9781580083355. http://books.google.com/books?id=JLeP4E1dQUUC&printsec=frontcover&source=gbs_atb#v=onepage&q&f=false. Retrieved 6 May 2011.
- ^ Bennett, Beverly Lynn; Sammartano, Ray (2008). The Complete Idiot's Guide to Vegan Cooking. Penguin. pp. 17. ISBN 1592577709, 9781592577705. http://books.google.com/books?id=3Y97sfq4eWoC&pg=PA17#v=onepage&q&f=false. Retrieved 6 May 2011.
- ^ Dragonwagon, Crescent; Gourley, Robbin (2002). Passionate Vegetarian. Workman Publishing. pp. 639. ISBN 1563057115, 9781563057113. http://books.google.com/books?id=xY-g93zG698C&pg=PA639#v=onepage&q&f=false. Retrieved 6 May 2011.
- ^ Liem IT, Steinkraus KH, Cronk TC (1977 December). "Production of vitamin B-12 in tempeh, a fermented soybean food". Appl Environ Microbiol 34 (6): 773–6.. PMC 242746. PMID 563702. http://www.unboundmedicine.com/medline/ebm/record/563702/abstract/Production_of_vitamin_B_12_in_tempeh_a_fermented_soybean_food_.
- ^ Delores D. Truesdell, Nancy R. Green, Phyllis B. Acosta (1987). "Vitamin B12 Activity in Miso and Tempeh". Journal of Food Science 52 (2): 493–494. doi:10.1111/j.1365-2621.1987.tb06650.x. http://www3.interscience.wiley.com/journal/119470042/abstract?CRETRY=1&SRETRY=0.
- ^ Allison A. Yates. National Nutrition and Public Health Policies: Issues Related to Bio-availability of Nutrients When Developing Dietary Reference Intakes (from January 2000 conference: Bio-availability of Nutrients and Other Bio-active Components from Dietary Supplements. http://jn.nutrition.org/cgi/reprint/131/4/1331S.pdf.
- ^ "Vitamin B12: Are You Getting It?". Vegan Health. http://www.veganhealth.org/b12/plant.
- ^ "New Vegetarian Food With Several Health Benefits". ScienceDaily. May 30, 2008. http://www.sciencedaily.com/releases/2008/05/080528095627.htm. Retrieved May 2008.
Notations
- Shurtleff, William, and Akiko Aoyagi. 1979. The book of tempeh: A super soyfood from Indonesia. New York: Harper & Row (Colophon Books). ISBN 0-06-091265-0.
- Shurtleff, William, and Akiko Aoyagi. 1985. The book of tempeh. Berkeley, California: Ten Speed Press.
- Shurtleff, William, and Akiko Aoyagi. 1985. History of tempeh: A fermented soyfood from Indonesia. 2nd ed. Lafayette, California: Soyfoods Center. ISBN 0-933332-21-1.
- Shurtleff, William, and Akiko Aoyagi. 1989. Bibliography of tempeh and tempeh products: 1,416 references from 1815 to 1989. Lafayette, California: Soyfoods Center. ISBN 0-933332-47-5.
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