Preheat a grill or grill pan to medium heat.
While the grill is preheating, combine the cherry tomatoes, basil, salt and pepper in a bowl.
Place the bread slices on the grill and cook for 1 to 2 minutes per side, until lightly toasted with grill marks.
While the bread is still warm, rub one side of each slice with the cut side of the garlic clove.
Spoon the tomato mixture onto the grilled bread.
Finish with a light drizzle of balsamic glaze and serve immediately.