Au Gratin Scalloped Potatoes

IDAHO POTATO SLICES 62.7% , modified corn starch 18.6% , salt 0.7% , maltodextrin 0.7% , whey 0.7% , coconut oil 0.7% , dehydrated onion 0.7% , buttermilk powder 0.7% , dried garlic 0.7% , cheddar 0.7% , blue cheese 0.7% , soya oil 0.7% , sunflower lecithin 0.7% , natural flavouring 0.7% , E415 0.7% , sugar 0.5% , parsley 0.5% , soice 0.5% , E160b 0.5% , E160c 0.5% , E222 6.9%