Macaroni Casserole

Yield:	16 Servings
Categories:	Main Dishes, Side dishes

16	oz	Elbow Macaroni
2	cn	Cream of Mushroom Soup; Undiluted
1 1/2	lb	Sharp Cheese; Grated
1/2	c	Butter
2	lg	Green Peppers; Chopped
2	lg	Onions; Chopped
8	oz	Pimientos; Chopped
8	oz	Water Chestnuts; Drained and Sliced
8	oz	Button Mushrooms; Drained