01 - In a medium bowl, combine the parsley, cilantro, minced garlic, red wine vinegar, olive oil, dried oregano, red pepper flakes, kosher salt, black pepper, and lemon zest. Stir thoroughly until all ingredients are evenly incorporated into a vibrant, herbaceous sauce.
02 - Transfer 1/4 cup of the chimichurri to a small bowl and set aside. This reserved portion will be used as a finishing drizzle when serving.
03 - Place the peeled and deveined shrimp in a separate bowl. Pour the remaining chimichurri sauce over the shrimp and toss to coat evenly. Allow the shrimp to marinate for 10 to 15 minutes at room temperature.
04 - Heat a grill pan or large skillet over medium-high heat until it is thoroughly hot and lightly smoking. If using an outdoor grill, preheat to medium-high and oil the grates.
05 - Thread the marinated shrimp onto skewers if grilling, or place them directly into the hot pan. Cook for 2 to 3 minutes per side until the shrimp turn bright pink and are just cooked through, being careful not to overcook.
06 - Remove the shrimp from the heat and arrange on a serving platter. Drizzle generously with the reserved chimichurri sauce and garnish with lemon wedges and additional chopped parsley as desired. Serve immediately while hot.