Baked Potato Casserole

8 cooked, peeled and diced potatoes
1 pound American cheese, sliced in strips
1 cup mayonnaise
1/2 cup chopped onion
Salt and pepper to taste
1/2 pound fried bacon, chopped

Combine first four ingredients. Place in 9 x 13-inch pan. Top with bacon. Bake 1 hour at 325 degrees F.

Serves 12