1 (7 1/4 oz.) box Kraft macaroni and cheese
1 can cream of chicken or mushroom soup
1/2 c. milk
3/4 c. diced onion
1 (12 oz.) can corned beef, diced
3 tbsp. butter, melted
3/4 c. corn flake crumbs

Cook macaroni as directed and drain. Blend in cheese, soup, milk, onion, and corned beef. Pour into a greased 3-quart casserole. Combine butter and corn flake crumbs. Sprinkle on top and bake at 350 degrees for 45 minutes.