2 cups uncooked macaroni
1 can (12 ounces) corned beef, chopped
1/2 pound cheese, cubed
1 (10 1/2 ounce) can cream of chicken soup
1 cup milk
1/4 cup chopped onion
3/4 cup buttered bread crumbs

Preheat oven to 350 degrees.  Cook macaroni according to package directions; drain.  Combine remaining ingredients.  Top with buttered bread crumbs.  Bake for 1 hour.