6 med potatoes, peeled and sliced
1/4 c chopped onion
2 c diced cooked ham
3 T butter
3 T flour
1 t salt
1/4 t pepper
1 T butter
2 1/2 c milk
1 c shredded cheese

Place sliced potatoes in large greased casserole dish.  Add ham & onion.  Make white sauce (cook 3 T butter, flour, salt & pepper until thickened and bubbly – whisking constantly) and pour over potatoes.  Stir and season to taste. (may be frozen at this point – thaw before cooking)  Bake at 350 for 30 min, add cheese to top and bake an additional 15 min.  Yield: 4-6 servings