01 - In a small bowl, combine the minced garlic, chopped parsley, rosemary, thyme, olive oil, lemon juice, kosher salt, and black pepper. Stir until a smooth, fragrant paste forms.
02 - Place the chicken breasts in a large resealable plastic bag or a shallow dish. Pour the marinade over the chicken, massaging it into each piece to ensure even, thorough coating. Seal the bag or cover the dish and refrigerate for at least 15 minutes, or up to 2 hours for more pronounced flavor.
03 - Preheat the oven to 400°F or set a grill to medium-high heat, allowing it to reach the proper temperature before cooking.
04 - Remove the chicken from the marinade, letting any excess drip off, and discard the remaining marinade. For oven method: arrange the chicken in a baking dish and bake for 25–30 minutes until the internal temperature registers 165°F on a meat thermometer. For grill method: grill the chicken for 6–7 minutes per side until fully cooked through with appealing char marks.
05 - Transfer the cooked chicken to a cutting board and let it rest for 5 minutes to allow the juices to redistribute. Slice or serve whole, garnished with fresh chopped parsley and lemon wedges on the side.