Combine lime juice, garlic, pepper, oil, cilantro, salt and pepper. Marinate chicken covered in refrigerator 1 hour or as long as overnight. Grill on barbecue grill (over mesquite if desired) until done. Cut in bite-size strips. Place on warm flour tortillas and add desired toppings -- shredded lettuce, tomato, salsa, pico de gallo, guacamole and/or sour cream.