Cha Siew Bao (Stuffed, Steamed Buns)

Yield:	10 Buns
Categories:	Chinese, Pork

		DOUGH
1	tb	Yeast
1/2	c	Warm water
1/4	ts	Salt
1	c	All-purpose flour
		FILLING
3		Scallions, minced (white part only)
1/2	ts	Grated fresh ginger
2	tb	Oil, peanut
1/2	lb	Ground pork sausage