The ornamental design for a gasket with a handle, as shown and described.
FIG. 1 is a perspective view of the left, front, and bottom of a gasket with a handle, showing our new design.
FIG. 2 is a front view thereof, the rear view being a mirror image of the front view.
FIG. 3 is a bottom view thereof, the top view being a mirror image of the bottom view.
FIG. 4 is a left side view thereof; and,
FIG. 5 is a right side view thereof.
Portions or features of the article not shown in the drawings form no part of the claimed design. The broken lines in the drawings form no part of the claimed design.