1. Prepare purple sweet potato.

2. Steam in a pot.

3. Add white sugar to purple sweet potato puree and mix well.

4. When the dough has fermented to double in size, take it out and knead it thoroughly to press out the air inside.

5. Knead the dough into long strips, then divide it into small pieces, roll it into a dough, and put the cooked purple sweet potato puree into the flattened dough.

6. Use the tiger's mouth to slowly close it and seal it, then gently press it flat with your hands, and let it wake up for ten minutes.

7. Dip the dough into sesame seeds.

8. Put it in the frying pan and sear it until both sides are golden brown.