Beef Macaroni Casserole
["1 lb. ground beef", "1/3 c. milk", "2 eggs", "1/2 c. ketchup", "1/4 c. chopped onion", "1 1/2 tsp. salt", "1 (8 oz.) pkg. elbow macaroni, cooked", "2 tsp. prepared mustard", "1/4 c. chopped green pepper", "1/2 c. mayonnaise", "1 c. grated American cheese", "1/2 c. dry bread crumbs", "2 Tbsp. melted butter or margarine", "6 slices tomato"]
["Mix beef, milk, eggs, ketchup, onion and salt.", "Set aside.", "Mix cooked macaroni, mustard, green pepper and mayonnaise.", "Spread this mixture in greased 2-quart baking dish.", "Spread beef mixture over top.", "Sprinkle with cheese; top with bread crumbs and butter.", "Bake at 325\u00b0 for 20 minutes.", "Place tomato slices on top and bake 10 minutes longer.", "Makes 8 servings."]
["ground beef", "milk", "eggs", "ketchup", "onion", "salt", "elbow macaroni", "mustard", "green pepper", "mayonnaise", "American cheese", "bread crumbs", "butter", "tomato"]