2 lbs. potatoes (about 6 med. potatoes)
3 tbsp. butter
3 tbsp. flour
Salt and pepper
2 1/2 c. milk
1/4 c. finely chopped onions
1 tbsp. butter

Wash and peel potatoes, slice thinly about 4 cups. Melt 3 tablespoons butter in sauce pan. Over low heat, blend in flour and seasoning over low heat. Add milk heat to boiling. Stirring constantly boil 1 minute. In greased 2 quart casserole arrange potatoes, 2 layers, onions also.