Crockpot Creamy Scalloped Potatoes

Approx. 6 medium potatoes
1 small onion, thinly sliced
1/4 tsp. cream of tartar
1/4 c. flour
1 tsp salt
1/4 tsp pepper
2 Tbsp. butter
1 can cream of celery or cream of mushroom soup, whichever you prefer
2 slices American cheese or 1 C. grated cheddar cheese

Pare and thinly slice potatoes. Toss slices in 1 C. water and 1/4 tsp. cream of tartar. (This is so the potatoes don't turn brown). Drain. Put half of the sliced potatoes in a greased crockpot. Top with 1/2 the onion slices, 1/2 the flour, and 1/2 of the salt and pepper. Add remaining sliced potatoes and onions. Sprinkle with the remaining flour, salt and pepper. Add butter and undiluted soup. Cover and cook on low 7-9 hours, or high for 3-4 hours. Add cheese the last 30 minutes before serving. If desired in between layers add a few slices of ham, or a small package of cubed ham.

*This recipe can be adjusted as desired. I use a package of cubed ham and omit the onion slices for my family.