Crockpot Ham and Potatoes - Slow Cooker

6 potatoes, peeled and thinly sliced
2 cups cheddar cheese, shredded
1/2 -1 lb. ham, thinly sliced
1 onion, chopped 1 can (10 3/4 oz.) cream of mushroom soup

Layer the potatoes, then some cheese, then some ham and then chopped onion. Continue to layer to 3 inches from top of crockpot.
Then pour cream of mushroom soup on top. Let simmer for several hours on low until potatoes are cooked through.