Cheesie Potatoes - cooking recipe

Ingredients

7 to 8 medium size potatoes, sliced and cooked until almost done
8 oz. sour cream
1 can cream of celery soup
2 c. Cheddar cheese
2 c. Mozzarella cheese
1/2 c. butter
1/2 c. chopped onion

Preparation

Mix together soup, cheeses, butter and onion.
Layer potatoes and cheese mixture, then bake at 350\u00b0
until bubbly hot.