Abstract: The present invention features a kit or an attachment apparatus for roasting a small quantity of green coffee beans upon a rotisserie unit. The kit or apparatus is rotationally mounted to an oven or a grill. The kit contains a perforated, cylindrical, hollow drum that has at least one internal fin for stirring the tumbling coffee beans within the hollow drum, as it is caused to rotate. The drum is attachable to a spit of the rotisserie, which is, in turn, attachable to a drive motor. The drive motor and the distal end of the spit are each mounted by attachment brackets to respective, end walls of the oven or grill. The cylinder can receive the green coffee beans through the removal of an end lid of the drum, or through a hatch door located in a mid-portion of the cylindrical drum. A layer of insulation is wrapped about one portion of the spit, and acts as a handle for removing the heated drum of roasted beans from the oven or grill.