FIG. 1 is a perspective view of a cheese knife showing my new design; FIG. 2 is a front view of the cheese knife, the back side view being a mirror image; FIG. 3 is a top view of the cheese knife; FIG. 4 is a bottom view of the cheese knife; FIG. 5 is a right side view of the cheese knife; and, FIG. 6 is a left side view of the cheese knife.