PREHEAT broiler. Place baguette slices, in single layer, on baking sheet.
BROIL, 2 inches from heat, 45 seconds on each side or until lightly toasted on both sides.
COMBINE tomatoes and basil; spoon evenly onto toast slices. Top with the cheese. Broil an additional 30 seconds or until cheese is melted and topping is heated through. Serve warm.