1/2 stick butter
2 or 3 tbsp. flour
2 or 3 c. milk
Salt and pepper to taste
6-8 potatoes peeled and sliced thin
Chopped onion (very sm. onion)
1/2 stick butter
Parmesan cheese

Melt butter. Add flour, stirring all the time. When flour and butter is mixed well, gradually add milk to make white sauce. Melt the remaining butter in bottom of 9x13-inch casserole dish. Line dish with potatoes. Sprinkle with very small amount of onion. Add white sauce and cheese. Next layer the same as the top layer. Add remaining white sauce. Sprinkle with a lot of cheese. Bake at 350 degrees for 1 hour.