Abstract: A slicer having an interlock mechanism, the slicer comprising a tray for receiving a food product to be sliced, the tray being movable along a slicing path and having a tray arm. The slicer further includes a blade for slicing the food product as the tray moves along the slicing path and a carriage having a locking arm for receiving the tray arm. The locking arm is movable between a release position wherein the tray arm can be placed into and removed from the locking arm, and a locking position wherein the tray arm cannot be placed into or removed from the locking arm. The slicer has a gauge plate adjuster for controlling the position of a gauge plate in the slicer, and the gauge plate adjuster has a recess formed therein. At least part of the locking arm is received in the recess of the gauge plate adjuster when the locking arm is in the release position.