An apparatus usable in a kettle- or kamado-style grill instead of a conventional cooking grate. The apparatus includes a cooking surface support configured for support in a base of the grill in lieu of the conventional grate, and a complementary cooking surface supportable on the cooking surface support. The cooking surface support defines open fuel ports providing access to the fuel chamber. The apparatus may include a secondary fuel basket positionable within an open fuel port. An alternative apparatus comprises a unitary body adapted to be supported in the bottom portion of the cooking grill. The unitary body comprises a structural support portion configured to abut a bottom portion of the grill, and a cooking support portion spanning more than 50% of the area of the unitary body. The unitary body defines at least one open fuel port permit admission of additional fuel to the bottom of the grill.