Sour Cream Potatoes

Boil 9 medium potatoes; peel & cut up. Salt & pepper. Make a gravy with 2 can cream of chicken soup in 1 cube melted margarine. Add 1 chopped onion to this. Remove from heat & add 1 pint sour cream. Take 9x13 pan & place a layer of potatoes, a layer of gravy & a layer of grated cheese, making 2 layers of each, ending with cheese on top. Bake at 375° for 30 minutes or until heated through.