01 - In a small mixing bowl, combine the minced garlic, chopped parsley, rosemary, thyme, olive oil, lemon juice, kosher salt, and black pepper. Stir until a uniform paste forms.
02 - Place the chicken breasts in a large resealable plastic bag or a shallow dish. Pour the herb marinade over the chicken, massaging it into each breast to ensure even, thorough coating. Seal the bag or cover the dish and refrigerate for a minimum of 15 minutes, or up to 2 hours for more pronounced flavor.
03 - Preheat the oven to 400°F or set an outdoor grill to medium-high heat, approximately 375–400°F.
04 - Take the chicken breasts out of the marinade, allowing any excess to drip off. Discard the remaining marinade — do not reuse.
05 - For oven method: arrange the chicken in a single layer in a baking dish and bake for 25–30 minutes, until the internal temperature registers 165°F on an instant-read thermometer. For grill method: place chicken over direct heat and grill for 6–7 minutes per side, until charred and cooked through to 165°F internally.
06 - Transfer the cooked chicken to a cutting board and let it rest for 5 minutes to allow the juices to redistribute. Slice if desired, garnish with fresh parsley, and serve alongside lemon wedges.