Enchilada Pie

Yield:	6 Servings
Categories:	Beans, Beef

1	lb	Ground beef, lean; browned and drained
1	md	Onion; chopped
1	cn	Black beans
1	tb	Chili powder
8	oz	Tomato sauce
6		Corn tortillas
4	oz	Ripe olives; chopped
1 1/2	c	Cheddar cheese; shredded
1/2	c	Water