I won't add any "Shortening" for homemade steamed bun.
Plain Flour 250g
Mashed Pumpkin 130g
Pinch of Salt
Light Olive Oil 10g
Water 10ml - 15 ml (as usual, water might +/- because cooked pumpkin might contains lot of water)
~ Combine all ingredients to form a dough, rest till double size (about 50 minutes, depend on your room temperature).
~ Punch the dough to expel trapped air, then flatten, roll to rectangle shape and roll up again like swiss roll.
~ Cut and place on parchement paper, last proof for 25 minutes
~ Steamed for 12 minutes @ medium heat (I steamed from cold water at high heat 6 minutes till water boiling, then reduce to medium heat for 12 minutes) <<last 2 minutes open the lid slightly>>
~ Turn off heat, don't open the lid immediately, just open the lid a bit (ajar) and keep the buns in steamer for 5 minutes.