Wiltshire Ham Gratin

potato 38.0% , Cooked Wiltshire Ham 17.0% , cow's milk 12.5% , single cream 12.5% , green bean 8.0% , water 4.0% , extra mature cheddar 4.0% , mature cheddar 2.0% , breadcrumbs 1.0% , ham 0.5% , corn flour 0.3% , fortified british wheat flour 0.1% , butter 0.1% , rapeseed oil 0.0% , salt 0.0% , white pepper 0.0% , onion 0.0% , sunflower oil 0.0% , black pepper 0.0% , Preservative 0.0%