 Savoury pies may be filled with meat (as in a steak pie or a Jamaican patty), eggs and cheese (quiche) or a mixture of meat and vegetables (pot pie).Pies are defined by their crusts.A "filled" pie (also "single-crust" or "bottom-crust"), has pastry lining the baking dish, and the filling is placed on top of the pastry but left open.