Peter Pots Pottery has long been famous for its casseroles, and our pie plates are a customer favorite. Discover why stoneware makes excellent bakeware for yourself! All our casseroles, beanpots, and pie plates are guaranteed ovenproof. We will replace any casserole, bean pot, or pie plate that breaks under normal baking use in a conventional oven for five years from the date of purchase (proof of purchase required). They are not intended for use under the broiler. We recommend that our bakeware be at least 3/4 full so the casserole heats evenly.