Potatoes au gratin

Cooked sliced potatoes (potatoes [preserved with sodium bisulfite], water), water, white american cheese (cultured pasteurized milk and skim milk, buttermilk, milkfat, salt, contains less than 2% of sodium phosphate, milk protein concentrate, acetic acid, enzymes), half & half creamer [milk, cream, nonfat dry milk and disodium phosphate (processing aid)], processed cheese (cultured pasteurized milk and skim milk, buttermilk, whey, milkfat, salt, contains less than 2% of sodium phosphate, guar gum, xanthan gum, lactic acid, artificial color, enzymes), margarine (liquid and partially hydrogenated soybean oil, water, salt, vegetable mono & diglycerides, soy lecithin, natural and artificial flavor, beta carotene (color), vitamin a palmitate added), onions, food starch-modified, salt, cheddar cheese powder (cheddar cheese (milk cultures, salt and enzymes), disodium phosphate), garlic powder, cellulose gum.