Healthy Oilless Pumpkin Bao

Pumpkin is rich in antioxidant and fibre.  I try to include it as much as possible in my daily diet (Please take note that it is not suitable for diabetics).  I make up this bao recipe.  Please let me know whether you like it.
Ingredients

• 300g pumpkin
• 1 small potato
• 3/4 cup pumpkin/potato water
• 1 tsp yeast
• 4 - 5 cups plain flour
• 15pcs of pan-fried ham (can vary the fillings)

Procedure

1. Peel pumpkin and potato then slice them.
2. Boil them until they are soft.  Reserve 3/4 cup of the pumpkin/potato water.
3. Mash pumpkin and potato until smooth.  Let it cool down.
4. Add the 3/4 cup reserve water to mashed pumpkin and potato.
5. Stir in yeast.  Mix well.
6. Add plain flour 1 tbsp at a time.  Keep adding plain flour and stirring until the mixture turn into soft dough.
7. Roughly knead the dough and form into a ball.
8. Cover it and let it rise until the size is doubled (It takes me ~4 hours during winter).
9. Punch it down to release all the air.  Add more flour if it is too sticky.
10. Divide dough into 15pcs.
11. Roll into a rectagular shape which is double the size of the ham.
12. Fold in the ham.
13. Boil hot water to steam the bao.(Tips : Do not put bao into steamer until the water is boiling hot)
14. Steam for 10 min using high heat.

Serving Suggestion:
Add some shredded lettuce, carrot and chili sauce before serving.