1 medium onion
2 tablespoons butter
2 tablespoons flour
2 1/4 cups milk
salt and white pepper to taste
1 cup ham, chopped
5 medium to large potaotes, thinly sliced
3/4 cup cheese of your choice, grated
Finely chop and saute' the onion. Then remove it from the pan to a small bowl and set aside. In the same pan place the butter and flour and cook until the flour browns slightly, then add milk and whisk until smooth and sauce thickens. Return onions back to the pan with the sauce. Add salt and white pepper to taste.
In a 3 1/2 quart casserole dish layer potatoes, cheese, ham, and sauce, ending with sauce and a sprinkle of cheese.
Bake covered at 350 degrees Fahrenheit for 1 hour and 10 minutes, then 10 minutes more with the lid off.