A compact portable heating device adapted to heat multiple food products simultaneously is provided. The heating device includes at least one heating element positioned opposite at least one other heating element to form a slot between heating surfaces of the elements for receiving food product. One heating element is mounted to move linearly along a longitudinal axis substantially perpendicular to the heating surfaces. Preferably, a first set of movable heating elements are meshed with a second set of heating elements to form an alternating arrangement. One or more heat generators, e.g. steam generators, are positioned to provide heat while minimizing the size of the device.