1 1/2 c. cooked macaroni
1 pkg. grated Cheddar cheese
2 pkg. Partridge chipped beef
1 whole onion, chopped
1 stick butter
1 c. milk
1 can plain mushroom soup

Saute onion in butter. Cut chipped beef into small pieces and mix with the grated cheese and macaroni. Pour into buttered casserole and let stand overnight in refrigerator. Pour milk and mushroom soup over this before placing in a 350 degree oven. Bake 30 minutes or until heated completely and casserole is set.