Scalloped Potatoes

Directions

1. 1
   Boil potatoes and medium onion; boil until tender.
2. 2
   Pour water off potatoes except 1 cup.
3. 3
   Melt margarine; add flour, milk and water off boiled potatoes and salt.
4. 4
   Cook until thick.
5. 5
   Pour over sliced potatoes; add cheese, more potatoes, sauce, cheese and more potatoes until all is gone.
6. 6
   Cook at 350° for 1 hour.