2 1/2 tbsp. butter
2 1/2 tbsp. flour
1 tsp. salt
2 c. milk
6 medium potatoes (peeled and sliced thin)
cheese

Melt butter in 2 qt. saucepan.

Stir in flour and salt. add milk slowly, stirring constantly until sauce boils and thickens. Add potatoes. Heat, stirring occasionally. Pour into greased 2 qt. casserole dish. Cover with foil and bake at 350°F for 30 minutes, or until done. Put cheese on top and let melt.