A cooking appliance includes a bottom plate and a turntable. The bottom plate defines an aperture that receives the turntable such that the turntable is flush-mounted with the bottom plate to provide a floor of a cooking cavity as substantially continuous. A rotary hub engages with an underside of the turntable to transmit rotational motion to the turntable from a motor. The turntable includes a first material and the bottom plate includes a second material.