Au Gratin Potatoes
["2 lb. potatoes", "1 medium onion, chopped", "1/4 c. margarine", "1 Tbsp. flour", "1 tsp. salt", "1/4 tsp. pepper", "2 c. milk", "2 c. sharp Cheddar cheese, grated", "1/4 c. bread crumbs"]
["Peel and cut potatoes into thin slices.", "Cook and stir onion in margarine in 2-quart saucepan until onion is tender.", "Cook over low heat, stirring constantly until mixture is bubbly.", "Remove from heat.", "Stir in milk and 1 1/2 cups of the cheese.", "Heat to boiling, stirring constantly.", "Boil and stir for 1 minute.", "Place potatoes in 1 1/2-quart casserole.", "Pour cheese sauce over potatoes.", "Cook, uncovered, in 325\u00b0", "oven for 1 hour and 20 minutes."]
["potatoes", "onion", "margarine", "flour", "salt", "pepper", "milk", "Cheddar cheese", "bread crumbs"]