Process first 7 ingredients in a blender or food processor until smooth, stopping to scrape down sides. Pour mixture into large zip-top plastic freezer bag; add pork. Seal and chill at least 4 hours.
Remove pork from marinade, discarding marinade.
Grill pork, covered with grill lid, over medium heat (300° to 350°) 11 to 13 minutes on each side or until a meat thermometer inserted in thickest portion registers 155°. Remove from grill. Loosely cover pork with foil; let stand 10 minutes or until thermometer registers 160°. Cut pork into slices, and serve over toasted bread. Top with Blueberry Salsa.