Homemade natto (fermented soybeans)
Ingredients:
two cups dried soybeans
water
one package commercial natto
Preparation time: 2-3 days
Preparation
Directions
Note: Please read the entire recipe first and make a note of the
ingredients and utensils that will be needed. The starter culture must be
obtained from store-bought natto, unless you have other sources such as
rice straw.
1. Soak two cups of dried soybeans overnight in ten cups of
water.
2. Put the soybeans in a stainless steel basket (or colander) and cover it
with a piece of cloth slightly larger than the basket.
3. Put the above in a pressure cooker with 3 cups water, and place it on
the stove. Turn on the stove.
4. After the pressure cooker starts hissing, turn down the flame so that
the hissing is at its minimum level.
5. Cook for 15 minutes (measured from the time the hissing has
started).
6. DO NOT OPEN the pressure cooker yet. Allow the pressure cooker and its
contents to cool down. If waiting is not your style, place the pressure
cooker in the sink filled with cold water. (The soy beans are considered to
have cooled down as long as its temperature is below 140 degrees F.)
7. Make sure that the kitchen counter and its surrounding area are
absolutely clean. Sterilize a tablespoon with boiling water.
8. Wash your hands and arms - long-sleeved shirts not recommended.
9. Have a package of commercial natto ready.
10. Open the lid of the pressure cooker, peel back the cloth cover to one
end of the basket, and using the tablespoon, quickly mix in about two
spoonfuls of natto starter with the beans. Replace the cloth cover.
11. Close the pressure cooker lid with its air relief hole
uncovered.
12. Place the cooker in a picnic ice-chest and place an electric heating
pad over it. Replace the ice-chest cover.
The natto will be ready in between 24 and 48 hours, depending on the
temperature of the heating pad. As an alternate heat source, a 7.5-watt
lightbulb may be used. If you don't have a pressure cooker, a regular pot
may be used. In this case, the cooking time will need to be increased to about
two hours, and the amount of cooking water to about six cups.
