Corned Beef Casserole

1-1/2 pkgs. (7 oz. size) elbow macaroni or saladettes
1 can cream of chicken soup (Campbell's)
1/2 can canned milk
1/2 c. grated cheese or chopped Velveeta
1/2 can corned beef – broken up
1/4 c. grated onion (optional)
Potato chips

Cook macaroni in salted water. Put in large casserole or baking pan. Add soup, milk, cheese, corned beef and stir until blended. Break potato chips over top. Bake at 350 deg. about 30 minutes. Serves 6.