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 until a thick, fragrant paste forms.
02 - Pat the chicken breasts dry with paper towels. Rub the herb paste generously over each breast, coating all sides evenly. Let marinate at room temperature for at least 10 minutes, or refrigerate for up to 2 hours for deeper flavor.
03 - Preheat an outdoor grill or grill pan to medium-high heat, approximately 400°F.
04 - Place the chicken breasts on the hot grill. Cook for 6 to 8 minutes per side until the internal temperature registers 165°F and the exterior develops a nicely charred crust.
05 - Transfer the grilled chicken to a serving platter. Loosely tent with aluminum foil and allow it to rest for 5 minutes so the juices redistribute.
06 - Serve the chicken with lemon wedges alongside and a generous sprinkle of freshly chopped parsley.