Au Gratin Potatoes

Directions

1. 1
   Peel and dice the cooked and cooled potatoes.
2. 2
   Set aside. Make the cheese sauce by melting in a saucepan the butter and flour.
3. 3
   Mix and cook until thickened.
4. 4
   Gradually add the milk, stirring constantly.
5. 5
   Add the salt and pepper and cook at low temperature until thick and smooth.
6. 6
   Add 1 cup of cheese and allow it to melt, stirring constantly.
7. 7
   Arrange alternate layers of potatoes, cheese sauce and onions in a greased casserole dish. Sprinkle the top of casserole with the remaining grated cheese. Bake, uncovered, at 375° for 25 minutes.
8. 8
   Yields 8 to 10 servings.