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. Let marinate at room temperature for at least 10 minutes, or refrigerate for up to 2 hours for deeper flavor.
03 - Preheat your outdoor 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 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 allow it to rest for 5 minutes so the juices redistribute evenly.
06 - Serve the chicken accompanied by lemon wedges and a generous sprinkle of freshly chopped parsley.