I sliced potatoes with food processor. I didn't have cream of chicken soup, so I substituted fat free cream of mushroom. I left out the butter, used fat free sour cream, but added 2 cups of cheese. Mixed everything in one large bowl, sprayed a large glass baking dish with Pam and cooked the potatoes at 350 for 1 hour and 10 minutes. During the last 10 or so minuteds I put the last 1/2 cup of cheese on top. Took the dish out of the oven when the cheese of golden brown. I would make this again. Very good and easy.