Grilled Swordfish Steaks With Whole Lemon Dressing

Name: Grilled Swordfish Steaks With Whole-Lemon Dressing
Ingredients: 4 (4–6-oz.) swordfish steaks (1–1½ thick); 7 Tbsp. plus 1½ tsp. extra-virgin olive oil, divided; plus more for grill; Kosher salt; 1 large lemon; 5 sprigs oregano, thyme, or marjoram, leaves picked, finely chopped; 2 garlic cloves, finely grated; 1 Tbsp. capers (not drained); 2 tsp. ground coriander; 1 tsp. sugar; ½ tsp. crushed red pepper flakes (optional); Freshly ground black pepper