How to Make It
In a medium bowl, whisk the parsley with the olive oil, lemon juice, oregano, garlic and crushed red pepper. Season the chimichurri generously with salt and pepper. In a large bowl, toss the shrimp with 1/4 cup of the chimichurri and refrigerate for 30 minutes.
Light a grill or preheat a grill pan. Season the shrimp lightly with salt and pepper and grill over high heat, turning once, until lightly charred and just cooked through, 3 to 4 minutes. Transfer to a plate.
In a large bowl, toss the black-eyed peas with the tomatoes, arugula and 1/4 cup of the chimichurri; season with salt and pepper. Pile the salad on plates, top with the shrimp and serve, passing the remaining chimichurri at the table.