Baked Macaroni And Cheese
["1 (8 oz.) pkg. macaroni", "4 Tbsp. margarine", "3/4 c. bread crumbs", "1 small onion", "1 Tbsp. flour", "1 tsp. salt", "1/4 tsp. mustard", "1 1/2 c. milk", "8 oz. Cheddar cheese (2 c.)"]
["Boil macaroni; put in casserole dish.", "Melt 2 tablespoons margarine and toss in bread crumbs; set aside for topping.", "Melt 2 tablespoons margarine; add chopped onion.", "When onion is cooked, add flour, salt and mustard.", "Mix and add milk; cook until slightly thickened, then add cheese.", "Remove from heat and stir.", "Pour over macaroni; sprinkle on topping.", "Bake for 20 minutes in a 400\u00b0 oven."]
["macaroni", "margarine", "bread crumbs", "onion", "flour", "salt", "mustard", "milk", "Cheddar cheese"]