The ornamental design for a wearerattachablefoodtray, as shown and described.
FIG. 1 is a perspective view of a wearer attachable food tray;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a side view thereof (opposite side is mirror image);
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The crisscross pattern schematically depicted in FIGS. 5 and 6 indicates a change in material that is continuous throughout the surface on which the pattern is shown.