Au Gratin Potatoes

6 servings

2 Tbsp. butter or margarine
1 small onion, chopped
1 Tbsp. all-purpose flour
1/2 tsp. salt
1/4 tsp. pepper
2 cups milk
2 cups shredded Cheddar cheese
6 medium potatoes, peeled and thinly sliced
1/4 cup dry bread crumbs
Paprika, optional

Preheat oven to 375°. Melt butter in 2-quart saucepan over medium heat. Add onion and cook in butter for 2 minutes until tender, stirring occasionally. Stir in flour, salt and pepper. Cook until bubbly, stirring constantly. Remove from heat.
Stir in milk and heat to boiling for 1 minute, stirring constantly. Remove from heat. Stir in 1 1/2 cups of cheese until melted. Spread potatoes in ungreased 1 1/2-quart casserole. Pour cheese sauce over potatoes.
Bake for 1 hour, uncovered. Mix remaining 1/2 cup cheese and bread crumbs, then sprinkle over potatoes. Sprinkle with paprika, if desired. Bake uncovered for 15-20 minutes until top is brown and bubbly and potatoes are tender.