A device for cooking foodstuff includes a frame having an opening; and an insert removably coupled to the frame at the opening. The coupled frame and insert form a cooking plate comprising a top cooking surface for supporting foodstuff thereon and a bottom heat-receiving surface for receiving heat from a heat source. The insert comprises a first side having a generally flat surface and a second side having a corrugated surface comprising a pattern of ridges. The insert can be coupled to the frame with the first or second side facing up so that the side that is facing up forms a part of the top cooking surface. A set of cookware is also provided, which includes the frame and a plurality of such inserts, wherein the inserts differ from one another in at least one of dimension, shape, and composition.