Au Gratin Potatoes

Directions

1. 1
   Peel potatoes and boil for about 25 minutes.
2. 2
   Drain and set aside.
3. 3
   Cook and stir onion in margarine in 2-quart saucepan until onion is tender.
4. 4
   Stir in flour, salt and pepper.
5. 5
   Cook over low heat, stirring constantly, until mixture is bubbly.
6. 6
   Remove from heat.
7. 7
   Stir in milk and 1 1/2 cups of the cheese.
8. 8
   Heat to boiling, stirring constantly.
9. 9
   Boil and stir one minute.
10. 10
    Place potatoes in ungreased 1 1/2-quart casserole.
11. 11
    Pour cheese sauce on potatoes. Cook, uncovered, in 325° oven for 1 hour.