Purple steam bao

Ingredients
250g steam purple sweet potatoes
250g lukewarm water
500g Pao flour
1 tsp double action baking powder
100g sugar
50g shortening.. Can use margarine/butter
11g instant yeast (I used mauripan)

Method
1. Steam the sweet potatoes over high heat for 15 min and mash them .Set aside to cool.

2. Mix 250g lukewarm water with the instant yeast and set aside.

3. In a large mixing bowl, combine everything except the oil or shortening, and mix to form a dough.

4. Once a rough dough is formed, add in shortening and knead until you get a smooth, non-stick dough.

5. Cover the dough with kitchen towel and let it proof in a warm place until doubled in size.(about 1 hour)

6. After 1 hour, punch down the dough and knead again for 1-2 min.

7. Divide dough into 35g portions and shape them into small dough balls.

8. Flatten the dough into a small circle, add in 1 heaped tsp of the desired filling, seal the dough and shape it round, then place each bun with the sealed side down on a square piece of baking paper.

9. Cover the buns with kitchen towel and let them proof in a warm place for another 30-40 min until doubled in size.
10. Steam buns for 15 minutes. The water must be boiling before putting in the bun for steaming.