Outdoor cooking stove

FIG. 1 is a perspective view of an outdoor cooking stove showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The ornamental design for outdoor cooking stove, as shown and described.