Saute onion in butter. Cut chipped beef into small pieces and mix ... Pour into buttered casserole and let stand overnight in ... and casserole is set.
Mix noodles, soup, milk, corned beef, cheese, and onion. Pour into 1 1/2 quart greased casserole dish. Top with chips. Bake at 425 degrees for 15 minutes. Serves 4.