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 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 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 golden, lightly charred crust.
05 - Transfer the grilled chicken to a serving platter and tent loosely with aluminum foil. Allow the meat to rest for 5 minutes so the juices redistribute evenly throughout each breast.
06 - Serve the chicken alongside lemon wedges and finish with a generous sprinkle of freshly chopped parsley.