Creamy Scalloped Potatoes - cooking recipe

Ingredients

2 lbs potatoes (about 6 medium)
4 T margarine or butter
3 T flour
1 t salt
1/4 t pepper
2 1/2 c milk
1 small onion, finely chopped (about 1/4 c)

Preparation

Cut potatoes into thin slices to measure about 4 cups. Heat 3 T margarine in saucepan, until melted.
Blend in flour, salt and pepper.
Cook, stirring constantly, until smooth and bubbly; remove from heat. Stir in milk.
Heat to boiling, stirring constantly.
Boil and stir 1 minute.