Mix first three ingredients for topping in a small bowl. Let stand so tomatoes release their juices.
Meanwhile brush both sides of bread with olive oil. Using either the outdoor or indoor grill, place slices 4-6 inches away from heat and grill for 2-3 minutes on each side, until lightly browned.
Rub cut clove of garlic over surface of hot bread. Place bread on serving plates and spoon topping over slices. Garnish with basil. Makes 4 servings. Enjoy!