Steamed purple sweet potato man tao

1. Mix water and dry yeast in a mixing bowl.

2. Then, add in castor sugar, pau flour, mashed purple sweet potato and shortening.

3. Knead into smooth dough.

4. Cover and rest for 5 minutes.

5. Roll dough into rectangular shape, fold the dough 1/3 from the inner edge and 1/3 from the outer edge.

6. Roll into rectangular shape. Brush the surface with water.

7. Roll the flat dough sheet from the edge into round cylinder shape.

8. Divide it into 16 pieces.

9. Place the bun on the grease proof paper. Cover and rest for another 15 minutes.

10. Steam the bun for 10 minutes.

11. Ready to serve.