Crock Pot Ham and Potatoes

INGREDIENTS:
2 lbs. potatoes (about 6 medium), thinly sliced
2 cups chopped ham
1 tsp. salt
1/2 tsp. pepper
3 Tbsp. butter
1 small onion, thinly sliced
2 cans cream of mushroom soup
1/4 cup flour
2 cups grated cheddar cheese
1/2 tsp. cream or tartar
1 cup water

INSTRUCTIONS:
Toss potato slices in water and cream of tartar.  Drain.  Put half of sliced potatoes in a greased slow cooker.  Top with half of the ham, onion slices, flour, salt and pepper.  Add remaining ingredients in the same order.  Add butter and undiluted soup.  Cover and cook on low for 7-9 hours or on high for 3-4 hours.  Add cheese 30 minutes before serving.