Hash Browns Casserole Ii - cooking recipe

Ingredients

1 1/2 cups onions, chopped
vegetable oil cooking spray
3 tablespoons all-purpose flour
1/2 teaspoon dry mustard
1/4 teaspoon salt
1 1/4 cups skim milk
1/2 cup nonfat chicken broth
1 1/2 cups low-fat cheddar cheese
3/4 cup lowfat swiss cheese
1/2 teaspoon pepper
8 ounces fat free sour cream
32 ounces frozen southern style hash brown potatoes, thawed
paprika

Preparation

Coat a medium saucepan with cooking spray; place over medium heat until hot. Add onion, and saute 3 minutes or until tender.
Add flour, mustard, and salt; stir well, and cook an additional minute. Remove form heat; gradually add milk and broth, stir in with a wire whisk until blended.
Cook over medium heat 5 minutes or until thickened, stirring constantly.
Remove from heat; add cheeses an pepper, stirring until cheeses melt. Stir in sour cream.
Combine cheese mixture and potatoes; stir well.
Spoon into a 13 x 9 x 2\" baking dish coated with cooking spray.
Sprinkle with paprika.
Cover and bake at 350: for 35 minutes.
Uncover and bake an additional 35 minutes.