A food warming apparatus includes a cabinet with one or more heating compartments for holding one or more trays. Each tray has a rim extending outwardly from a tray opening and may contain previously cooked food portions. One or more dividers are removably mounted inside a heating compartment, dividing the heating compartment into a first sub-compartment and second sub-compartment. The one or more dividers include a first support flange that extends into the first sub-compartment and a second support flange that extends into the second sub-compartment. The first support flange supports a rim of a first tray in the first sub-compartment such that the first tray is suspended above a lower compartment surface of the heating compartment. The second support flange supports a rim of a second tray in the second sub-compartment such that the second tray is suspended above the lower compartment surface of the heating compartment.