1. The purple sweet potato is cooked.
2. Press it into a mashed purple potato while it's hot.
3. For the purple potato dough, the yeast is dissolved in warm water, and the amount of water is included in the total amount of water used.
4. Knead into purple sweet potato dough, cover with plastic wrap and let stand for 15 minutes.
5. Prepare the white dough ingredients.
6. Knead into a dough, cover with plastic wrap and let it stand for 15 minutes.
7. The white dough has been made.
8. The made purple sweet potato dough.
9. The two types of dough were rounded separately. The portion should be the same.
10. Roll out into large thin discs respectively.
11. Place the purple sweet potato on top of the white noodles and align them.
12. Roll it up from one end, and roll it tighter.
13. Cut evenly with a knife. I made ten steamed buns.
14. Cover with a kitchen cloth and let stand for ten minutes.
15. Put it in a basket, steam for ten minutes after boiling the water, turn off the heat, and steam again for five minutes.
16. Steamed.
17. Finished product.
