9 medium-size potatoes, peeled and thinly sliced
14 pieces ham (1-inch square by 1/8-inch thick); leftover baked ham is best
14 pieces cheese, Swiss or Cheddar (1-inch square by 1/8-inch thick)
10 slices onion (1/8-inch thick)
4 tbsp. flour
4 tbsp. butter
1 1/2 c. milk
Salt and pepper to taste

Preheat oven to 350°F. Divide potato slices into 3 portions. Liberally grease the bottom and sides of a 9-inch by 13-inch casserole. Put one portion of the sliced potatoes in the bottom of the casserole and dot with half of the butter. Spread around 7 slices of ham, 5 slices of cheese and half the onions. Then sprinkle 2 tablespoons flour over the layer, and salt and pepper to taste.

Put a second of the sliced potatoes on top of the first layer and repeat the process. Finally add the third portion of potatoes and put the remaining pieces of cheese on top. Pour milk over all. Place in oven, cover loosely with foil, and bake for 40 minutes. Remove foil and continue baking until potatoes are tender, about 1 1/2 hours more.

Makes 8 to 10 servings.