Au Gratin Potatoes - cooking recipe

Ingredients

2 lb. potatoes
1 medium onion, chopped
1/4 c. margarine or butter
1 Tbsp. flour
1 tsp. salt
1/4 tsp. pepper
2 c. milk
2 c. shredded natural sharp Cheddar cheese (about 8 oz.)
1/4 c. fine dry bread crumbs
paprika

Preparation

Slice potatoes into thin slices to measure about 4 cups.
Cook and stir onion in margarine in 2-quart saucepan until onion is tender.
Stir in flour, salt and pepper.
Cook over low heat, stirring constantly, until mixture is bubbly; remove from heat. Stir in milk and 1 1/2 cups of cheese.
Heat to boiling, stirring constantly.
Boil and stir 1 minute.
Place potatoes in ungreased 1 1/2 quart casserole.
Pour cheese sauce on potatoes.
Cook uncovered in 325\u00b0 oven 1 hour and 20 minutes or in 375\u00b0 oven 1 hour.