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 evenly over each breast, coating all surfaces. Let marinate at room temperature for at least 10 minutes, or refrigerate for up to 2 hours for deeper flavor.
03 - Preheat your grill or grill pan to medium-high heat, approximately 400°F.
04 - Place the chicken on the hot grill and cook for 6 to 8 minutes per side, until the internal temperature reaches 165°F and the exterior develops a nicely charred crust.
05 - Transfer the grilled chicken to a serving platter, cover loosely with aluminum foil, and let rest for 5 minutes to allow the juices to redistribute.
06 - Serve the chicken with lemon wedges alongside and a generous sprinkle of freshly chopped parsley.