In a large bowl combine the spices and the oil (and lime juice if using), whisk until combined. Toss the chicken breasts into the spices mixture until coated evenly.
Place the chicken on the hot grill grates and grill for 6 minutes. You'll know it's ready to turn when the chicken releases from the grill grates easily. Use tongs to turn the chicken over and continue to grill for 5 to 6 more minutes or until the chicken is fully cooked.
Transfer the chicken to a cutting board, tent with piece of aluminum foil and allow the meat to rest for 5 minutes before slicing or chopping.
Notes
Use for seasoning ground beef, turkey or chicken for tacos, nachos, burritos and more!