01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to fit chicken breasts in single layer.
02 - Whisk together balsamic vinegar, olive oil, honey, garlic, Italian herbs, salt, and pepper in small bowl until combined.
03 - Place chicken breasts in prepared baking dish. Pour balsamic marinade over chicken, turning to coat evenly.
04 - Bake uncovered for 20 minutes.
05 - Remove from oven. Top each chicken breast with tomato slices and mozzarella cheese.
06 - Return to oven and bake 8-10 minutes until chicken reaches internal temperature of 165°F and cheese is melted and bubbly.
07 - Broil for 2-3 minutes for golden, bubbly cheese topping if desired.
08 - Let rest 3 minutes. Garnish with fresh basil and drizzle with extra balsamic glaze before serving.