Swordfish With Rosemary Aioli

Preparation : In a small bowl, combine mayonnaise, lemon juice, garlic, and rosemary. Cover and refrigerate aioli until ready to use or for up to 2 days. Rinse fish and pat dry. Brush all over with oil. Arrange fish on cooking grate. Place lid on grill. Cook, turning once with a wide spatula halfway through cooking time, until fish is opaque but still moist in center (about 10 minutes; cut to test). Using spatula, transfer fish to a platter or individual plates. Serve with aioli. Season to taste with salt.