Creamy Crock Pot Scalloped Potatoes - cooking recipe

Ingredients

2 lbs potatoes (about 6 medium)
1 cup water
1/2 teaspoon cream of tartar
1/4 teaspoon pepper
3 tablespoons butter
1 small onion, thinly sliced
10 ounces cream of mushroom soup
1/4 cup flour
1 teaspoon salt
4 slices American cheese

Preparation

Peel and thinly slice potatoes and place in a medium mixing bowl.
In a Pyrex measuring cup, mix together water and cream of tartar. Pour mixture over potatoes; drain but don't rinse.
The cream of tartar keeps the potatoes from turning brown during cooking. You can use this method for any crock pot recipe that calls for potatoes.
Place half of potatoes in bottom of crock pot with half of the flour and sliced onion. Sprinkle half of the flour on top. Salt and pepper to taste.
Add remaining potatoes, onion and flour. Dollop butter over top of potatoes.
Spoon undiluted soup over top next.
Cook on Low for 6 to 8 hours and on High for 3 to 4.
Thirty minutes before serving add cheese by breaking it into small pieces; blend it.
I have doubled this recipe for my Rival 5 quart slow cooker and it turns out great.