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 to 15 minutes maximum to prevent texture degradation.
03 - If using wooden skewers, soak in water for at least 15 minutes to prevent burning.
04 - Preheat grill or grill pan to medium-high heat.
05 - Thread shrimp onto skewers, piercing through both the head and tail sections so each piece lays flat.
06 - Grill skewers for 2 to 3 minutes per side until shrimp become opaque and develop light char marks.
07 - Remove from heat and immediately sprinkle with chopped parsley. Serve hot with lemon wedges.