01 - In a medium bowl, combine the parsley, cilantro, minced garlic, red wine vinegar, olive oil, dried oregano, crushed 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 for finishing the dish.
03 - Place the peeled and deveined shrimp in a separate bowl and pour the remaining chimichurri 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 preheat until a drop of water sizzles on contact.
05 - Thread the marinated shrimp onto skewers if using an outdoor grill, 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, being careful not to overcook.
06 - Remove the shrimp from the heat and arrange on a platter. Drizzle with the reserved chimichurri and garnish with lemon wedges and additional chopped parsley as desired. Serve immediately.