1. Preheat grill to 300° to 350° (medium) heat. Combine first 3 ingredients in a zip-top plastic freezer bag; add chicken, turning to coat. Seal and chill 10 minutes, turning once.
2. Meanwhile, combine salsa and next 3 ingredients. Cover and chill until ready to serve.
3. Remove chicken from marinade, discarding marinade. Grill chicken, covered with grill lid, 6 minutes on each side or until done. Serve in flour tortillas with mango salsa and desired toppings.
Note: We tested with McCormick's Grill Mates Montreal Chicken Seasoning.