01 - In a mixing bowl, combine the parsley, cilantro, garlic, shallot, olive oil, red wine vinegar, oregano, red pepper flakes, smoked paprika, lemon zest, salt, and black pepper. Stir thoroughly until all ingredients are evenly incorporated.
02 - Transfer 1/3 cup of the chimichurri sauce to a small bowl and set aside for finishing the dish.
03 - Toss the peeled and deveined shrimp with the remaining chimichurri sauce until evenly coated. Cover and refrigerate for 10 to 15 minutes to allow the flavors to penetrate.
04 - Heat a grill or grill pan to medium-high temperature, ensuring the grates are clean and lightly oiled to prevent sticking.
05 - Thread the marinated shrimp onto skewers. Place on the hot grill and cook for 2 to 3 minutes per side, turning once, until the shrimp are pink, opaque, and lightly charred.
06 - Remove the shrimp from the grill and arrange on a serving platter. Drizzle with the reserved chimichurri sauce and garnish with lemon wedges and fresh parsley. Serve immediately.