1. Pour the flour, use warm water, add some yeast powder, and stir together.
2. Knead the dough well.
3. Crush the purple sweet potato, knead it with flour, wait until it is kneaded together, put the kneaded flour aside, and ferment the flour. Always watch the flour ferment well.
4. The fermented noodles are kneaded to form small balls, which are shaped like small steamed buns by hand.
5. After kneading the dough, let the flour wake up for about 15 minutes. The steamed buns are delicious and beautiful. After a while has passed, put it in a pot and steam. The pot will boil for half an hour. Enough.
