The ornamental design for a cookware handle, as shown and described.
FIG. 1 is a side view of a new cookware handle design;
FIG. 2 is a top view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a first perspective view thereof;
FIG. 5 is a second perspective view thereof;
FIG. 6 is a side elevation view thereof;
FIG. 7 is a front elevation view thereof; and,
FIG. 8 is a third perspective view thereof.
The dash-dot broken lines immediately adjacent the shaded areas represent the bounds of the claim and all other broken lines represent portions of the handle that form no part of the claimed design and/or the environment in which the handle resides. None of the broken lines form a part of the claimed design.