01 - Whisk together olive oil, lemon juice, garlic, lemon zest, salt, black pepper, and red pepper flakes in a medium bowl until thoroughly combined.
02 - Add shrimp to the marinade and toss to coat evenly. Cover and refrigerate for 10–15 minutes maximum to prevent toughening.
03 - If using wooden skewers, soak them in water for at least 15 minutes to prevent burning during grilling.
04 - Preheat grill or grill pan to medium-high heat, approximately 375–400°F.
05 - Thread shrimp onto skewers, piercing through both the head and tail sections so they lay flat for even cooking.
06 - Grill shrimp skewers for 2–3 minutes per side, or until shrimp turn opaque and develop light char marks.
07 - Remove from grill and immediately sprinkle with chopped parsley. Serve hot with lemon wedges on the side.