01 - In a small mixing bowl, combine the rosemary, thyme, parsley, garlic, smoked paprika, sea salt, black pepper, cayenne pepper (if using), olive oil, and lemon zest. Stir thoroughly until a thick, fragrant paste forms.
02 - Pat the chicken breasts dry with paper towels. Rub the herb paste evenly over each breast, coating all surfaces. Allow the chicken to marinate at room temperature for at least 10 minutes, or refrigerate for up to 2 hours for deeper flavor penetration.
03 - Preheat your outdoor grill or grill pan to medium-high heat, approximately 400°F. Ensure the grates are clean and lightly oiled to prevent sticking.
04 - Place the seasoned chicken breasts onto the hot grill. Cook for 6 to 8 minutes per side, until the internal temperature reaches 165°F when measured with a meat thermometer and the exterior develops a rich, charred crust.
05 - Transfer the grilled chicken to a serving platter and loosely tent with aluminum foil. Let the meat rest for 5 minutes to allow the juices to redistribute throughout.
06 - Arrange the chicken on plates, squeeze fresh lemon wedges over the top, and garnish with a sprinkle of chopped fresh parsley. Serve immediately.