01 - In a small bowl, combine the rosemary, thyme, parsley, garlic, smoked paprika, sea salt, black pepper, cayenne pepper (if using), olive oil, and lemon zest. Mix 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 sides. Allow the chicken to marinate for at least 10 minutes at room temperature, or refrigerate for up to 2 hours for deeper flavor penetration.
03 - Preheat your grill or grill pan to medium-high heat, ensuring the grates are clean and lightly oiled to prevent sticking.
04 - Place the chicken breasts on the hot grill and 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, 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 sprinkle of freshly chopped parsley over the top.