A cooking apparatus including a housing having an outer perimeter and a first opening. A flange extending from the housing defines the outer perimeter. An inner peripheral edge defines the first opening. A cooktop element has a first peripheral edge, and at least one grill element has a second peripheral edge. A plurality of holes are in a grill plate of the at least one grill element to allow matter to pass through the holes. The cooktop element and the at least one grill element are mounted to the housing in the first opening with at least part of the first and second peripheral edges facing each other and at least part of the inner peripheral edge facing the first and second peripheral edges. The housing is configured to insert into an opening of a support structure with the flange preventing insertion all the way through the opening of the support structure.