If you don't have a grill, broil the fish 4â€“5 inches from heat for 6â€“8 minutes (without turning) or until opaque in center.
Preheat grill to medium-high.
Combine dressing and basil in a medium bowl. Remove 2 tablespoons of dressing mixture; spoon over fish. Grill fish 8 minutes or until opaque in center, turning after 4 minutes. Sprinkle with salt and pepper.
While fish cooks, add tomato and avocado to dressing mixture in bowl; toss well. Spoon mixture over grilled fish. Yield: 4 servings (serving size: 1 fish fillet and 1/3 cup tomato mixture).