A cooking appliance comprising: a container that is to receive a food to be cooked, the container having a side wall or walls that provide a periphery surrounding a cavity within which the food is located; and a heating belt configured to apply heat to the container to cook the food in the container, the heating belt including: a flexible elongated base that is to at least partly surround the periphery, so that the heating belt can be urged towards the periphery, wherein the base includes an end extremity that is so that the effective length of the heating belt is adjustable to the size of the container; at least one heating element attached to the base to enable the heating element to be in thermal contact with the periphery, wherein only one major face of the heating element is exposed to the periphery for heat transfer to the container; and an elongated power conduit connected to the heating element and to provide for the connection of the heating element to a source of electric power so that upon electric power being delivered to the heating element, the heating element can heat the container, wherein the power conduit is flexible to provide for the elongation of the base. a container that is to receive a food to be cooked, the container having a side wall or walls that provide a periphery surrounding a cavity within which the food is located; and a heating belt configured to apply heat to the container to cook the food in the container, the heating belt including: a flexible elongated base that is to at least partly surround the periphery, so that the heating belt can be urged towards the periphery, wherein the base includes an end extremity that is so that the effective length of the heating belt is adjustable to the size of the container; at least one heating element attached to the base to enable the heating element to be in thermal contact with the periphery, wherein only one major face of the heating element is exposed to the periphery for heat transfer to the container; and an elongated power conduit connected to the heating element and to provide for the connection of the heating element to a source of electric power so that upon electric power being delivered to the heating element, the heating element can heat the container, wherein the power conduit is flexible to provide for the elongation of the base. a flexible elongated base that is to at least partly surround the periphery, so that the heating belt can be urged towards the periphery, wherein the base includes an end extremity that is so that the effective length of the heating belt is adjustable to the size of the container; at least one heating element attached to the base to enable the heating element to be in thermal contact with the periphery, wherein only one major face of the heating element is exposed to the periphery for heat transfer to the container; and an elongated power conduit connected to the heating element and to provide for the connection of the heating element to a source of electric power so that upon electric power being delivered to the heating element, the heating element can heat the container, wherein the power conduit is flexible to provide for the elongation of the base.