The ornamental design for a hamburgergrillbasket, as shown and described.
FIG. 1 is a top perspective view of a hamburger grill basket showing my new design;
FIG. 2 is a left side elevation view thereof, the right side being a mirror image;
FIG. 3 is a front end elevation view thereof;
FIG. 4 is a rear end elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is an exploded perspective view thereof.
The broken line representation of a handle, handle rods and clasp shown in FIGS. 1–7 are for illustrative purposes only and form no part of my claimed design.