Potato Mushroom Casserole - cooking recipe

Ingredients

4 medium potatoes
1 medium onion
1/2 tsp. salt
3/4 stick margarine
1 (10 1/2 oz.) can cream of mushroom soup
1/2 can water

Preparation

Peel and slice the potatoes and onion about 1/8-inch thick. In a large baking dish, arrange onion and potato slices in a layer.
Place chips of butter on top.
Pour the can of soup on top.
Pour 1/2 can of water on top.
Bake 1 hour at 350\u00b0.