Steps:

1, peeled and sliced purple potato, and steamed in a pot.

2. add a spoonful of sugar and press it into mud.

3. Add a proper amount of flour and a spoonful of yeast powder and mix well.

4. Add proper amount of pure milk, knead into dough, add plastic wrap and ferment for half an hour.

5. Press into large pieces and cut into small squares.

6. Pour the oil in the pan, put the cubes in, stir fry over low heat, and stir fry until golden and cooked.