1. The sweet potatoes are peeled, steamed and pressed into a puree.
2. Add powdered sugar and mix well.
3. Add eggs and stir well.
4. Add flour and yeast to form a smooth dough, cover with a damp cloth and leave to ferment in a warm place.
5. The fermented dough is taken out and placed on the chopping board and knead until it is cut and no bubbles are visible.
6. Roll the dough into a rectangular dough sheet.
7. Roll up and cut into small pieces.
8. Put it in the steamer for the second fermentation, steam it in a hot pot on cold water, turn to medium heat for 15 minutes, turn off the heat and steam for 5 minutes, open the lid (I deleted the original picture, and used a similar picture. under).
9. Mantou grinned.
