1. Wash soybeans thoroughly and let soak in water until they expand fully.
2. Bring water to a boil and put in the beans.
3. Boil over a high fire. Constantly add water until they get tender and soft.
4. Strain and begin fermentation.
5. Wrap the beans with dried leaves for 3-5 days until some fungi appear
6. Pound salt and soybeans to form a fine paste and season with ground roasted dried chilies. Set aside.
7. Wrap beans in banana leaves.
8. Roast or grill on a charcoal stove on a low fire until thoroughly heated and a nice aroma is released.

Rattana Phromphichai. (1999). Thua nao. In Saranukrom Wattanathamthai Phak Nuea (Vol.5, pp.2636-
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