Corned Beef with margarine

1 (12 ounce) can corned beef , crumbled 1 2/3 cups macaroni (cooked and drained) 1 1/2 cups cheddar cheese , grated 1 1/4 cups milk 1 (10 1/4 ounce) can[...]

1/4 cup butter or 1/4 cup margarine 1 cup finely minced onion 2 cups cooked peeled and sliced russet potatoes 2 cups chopped cooked fresh corned beef or 1 (12[...]

1 medium onion , chopped 2 tablespoons butter or 2 tablespoons margarine 2 tablespoons all-purpose flour 1 1/2 teaspoons salt 1 teaspoon Worcestershire sauce[...]