Start by mixing the orange zest, orange juice, extra-virgin olive oil, crushed garlic, capers, salt, and black pepper in a bowl. Whisk until the dressing looks smooth and glossy. I like to let it sit for a few minutes so the flavors blend nicely. Add basil just before serving to keep it fresh.
Pat the scallops completely dry using paper towels. This step is very important because moisture prevents browning. Season both sides lightly with salt and pepper. Let them sit at room temperature for a few minutes before cooking.
Place a large skillet over medium-high heat and add a small drizzle of olive oil. Allow the pan to get hot but not smoking. A properly heated pan ensures a beautiful sear without overcooking the scallops.
Place scallops in the pan with space between each one. Cook for about one minute until a golden crust forms underneath. Flip and cook the other side for another minute. The scallops should be opaque and tender inside.
Transfer the scallops to a serving plate immediately. Spoon the orange basil and caper dressing generously over the top. Serve right away while the scallops are warm and juicy.