Potato-Onion Casserole - cooking recipe

Ingredients

5 to 6 large potatoes, sliced 1/4-inch thick
3 medium onions, sliced 1/4-inch thick
2 cans cream of mushroom soup
1 stick butter
salt and pepper to taste

Preparation

Melt butter in casserole dish.
Add remaining ingredients and bake 1 hour at 350\u00b0.
Mushroom soup can be substituted for cream of chicken or celery.