1 pound potatoes
2 tablespoons margarine
2 tablespoons flour
1/2 teaspoon salt
1/8 teaspoon pepper
1 1/2 cups milk
2 tablespoons onion
1 teaspoon margarine

heat 2 tablespoons margarine in saucepan over low heat until melted. blend in flour, salt and pepper. cook over low heat, stirring constantly, until mixture is smooth and bubbly. remove from heat. stir in milk. heat to boiling, stirring constantly. boil and stir 1 minute. layer 1/2 the potatoes, all of the onion, and 1/2 of the sauce in a greased 1 quart casserole. top with remaining potatoes and sauce. dot with 1 teaspoon margarine. cover and cook in 350 degree oven 30 minutes. uncover and cook 35 minutes longer.