Scalloped Potatoes - cooking recipe

Ingredients

1 stick margarine
4 Tbsp. flour
1 1/2 c. milk
1 c. water (off boiled potatoes)
6 slices cheese
5 sliced potatoes

Preparation

Boil potatoes and medium onion; boil until tender.
Pour water off potatoes except 1 cup.
Melt margarine; add flour, milk and water off boiled potatoes and salt.
Cook until thick.
Pour over sliced potatoes; add cheese, more potatoes, sauce, cheese and more potatoes until all is gone.
Cook at 350\u00b0 for 1 hour.