4 lg. potatoes
2 lg. onions
1 c. milk
1 can Cheddar cheese soup

Spray medium baking dish with Pam. Cover bottom with 2 of the potatoes, thinly sliced. Cover this layer with 1 onion, sliced. Mix soup and milk and pour half of the mixture over the onions and potatoes. Repeat the process with remaining potatoes, onions and cheese mixture. Bake at 350 degrees approximately 1 1/2 to 2 hours or until potatoes are tender. Serves 4.