01 - In a medium bowl, combine the finely chopped parsley, cilantro, minced garlic, red wine vinegar, extra-virgin olive oil, dried oregano, crushed red pepper flakes, kosher salt, black pepper, and lemon zest. Stir thoroughly until all ingredients are evenly incorporated.
02 - Transfer 1/4 cup of the chimichurri sauce to a small bowl and set aside for finishing the dish.
03 - Place the peeled and deveined shrimp in a separate bowl and pour the remaining chimichurri sauce over them. Toss to coat evenly and let marinate for 10 to 15 minutes at room temperature.
04 - Set a grill pan or large skillet over medium-high heat and allow it to get hot, approximately 2 minutes.
05 - Thread the marinated shrimp onto skewers if grilling outdoors, or place them directly in the hot pan. Cook for 2 to 3 minutes per side until the shrimp turn pink and are just cooked through. Avoid overcooking to maintain a tender texture.
06 - Remove the shrimp from heat and arrange on a serving platter. Drizzle with the reserved chimichurri sauce and garnish with lemon wedges and additional chopped parsley as desired. Serve immediately.