Add something different to your tempeh by combining the traditional soybeans with some nutritious grains.
1 cup hulled soy beans, soaked 10 to 12 hours
1/2 cup brown rice, soaked 6 to 8 hours
1/2 cup hulled millet, soaked 6 to 8 hours
2 tablespoons rice vinegar
1 packet tempeh starter
1 gallon plastic zip-top bag with holes punctured throughout, or 1 banana leaf
Mix together the grains and soy beans. Dry with a towel or blow dryer. They need to be a bit moist, but there should be no water in the bottom of the mixing bowl.
Add the vinegar and sprinkle the tempeh starter over the bean and grain mixture. Stir thoroughly with a wooden or plastic spoon.
If you are using a plastic bag, prepare it by punching holes with a needle at 1/2-inch intervals.
Spoon the tempeh mixture into the prepared bags or leaves, secure, and flatten to the shape desired.
Incubate the beans at 88°F for 24 to 48 hours. See below for ideas for incubating the beans.
Check the beans after 12 hours. At this point in the process the fermentation will cause the beans to generate their own heat so you will normally need to reduce or even eliminate the external heat source. Be sure to use a thermometer to check the actual temperature (see below).
After 24 hours or so, the white mycelium will start to cover the surface of the beans. Over the next few hours the white mycelium will grow through the beans and will smell nutty.
After 24 to 48 hours, when the beans have become a single mass held together by the white spores, the tempeh can be refrigerated.