1. Prepare sweet potatoes and flour.

2. Peel the sweet potatoes and cut into small pieces.

3. Add water to the pot and bring to a boil over high heat. Place the sweet potatoes on the steaming rack and cook until cooked.

4. Mash the steamed sweet potatoes into mashed sweet potatoes.

5. Add flour and sugar and knead into a ball.

6. Kneaded sweet potato balls.

7. Take a small amount from the evenly kneaded dough and roll it into a ball like glutinous rice balls. Roll all the dough into a ball and set aside.

8. Kneaded sweet potato balls.

9. When the oil pan is 50% hot, roll in the kneaded sweet potato balls along the edge of the pan, shaking the pan continuously (this action can prevent the sweet potato balls from sticking to the pan, and can also prevent the sweet potatoes from sticking to the pan) The ball becomes rounder and rounder).

10. Meatballs in two minutes.

11. The meatballs rolling in the pot at five minutes.

12. Meatballs at seven minutes.

13. Take out the meatballs after controlling the oil and putting them on a plate.