02Heat a grill to high. Rub both sides of each swordfish steak with two of the basil leaves, leaving some of the now-bruised basil on top of each steak. Brush the steaks with the canola oil and sprinkle with salt and pepper. Grill, basil-side down, until charred, about 4 minutes. Turn and cook until opaque throughout, another 4 minutes. Remove to a platter and immediately spoon the relish over the fish.