Au Gratin Potatoes

Grrrrrgh!
Course : Microwave
From: HungryMonster.com
Serves: 6
 

Ingredients:

6 medium potatoes (about 2 pounds)
1/4 cup margarine or butter
1 medium onion -- chopped (about 1/2 cup)
1 tablespoon all-purpose flour
1 teaspoon salt
1/4 teaspoon pepper
2 cups milk
2 cups shredded natural sharp cheddar cheese(8 ounces)
1/4 cup fine dry bread crumbs
1 teaspoon paprika
 

Preparation:

Heat oven to 375 degrees. Prepare potatoes as directed. Cut into enough thin slices to measure about 4 cups. Heat margarine in 2-quart saucepan over medium heat. Cook onion in margarine about 2 minutes, stirring occasionally. Stir in flour, salt and pepper. Cook, stirring constantly, until bubbly; remove from heat. Stir in milk and 1-1/2 cups of the cheese. Heat to boiling, stirring constantly. Boil and stir 1 minute.Spread potatoes in ungreased 1-1/2-quart casserole. Pour cheese sauce over potatoes. Bake uncovered 1 hour. Mix remaining cheese and the bread crumbs. Sprinkle over potatoes; sprinkle with paprika. Bake 15 to 20 minutes longer or until top is brown and bubbly.