In a bowl, mix the natural avocado oil, lemon juice, garlic, cumin, paprika, salt, and pepper.
Place the chicken breasts in a resealable bag and pour the marinade over them. Seal the bag and marinate in the refrigerator for at least 30 minutes.
Preheat the grill to medium-high heat.
Grill the chicken breasts for 6-8 minutes on each side, or until fully cooked.
Serve with your favorite side dish.