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.
02 - Measure out 1/4 cup of the chimichurri 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.
04 - Heat a grill pan or large skillet over medium-high heat until it is smoking lightly.
05 - Thread the shrimp onto skewers if grilling, or place them directly in the pan. Cook for 2 to 3 minutes per side until the shrimp turn pink and are just cooked through. Do not overcook.
06 - Remove the shrimp from heat and transfer to a serving platter. Drizzle with the reserved chimichurri and garnish with lemon wedges and additional chopped parsley as desired.