01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to accommodate the chicken breasts in a single layer.
02 - In a small bowl, whisk together balsamic vinegar, olive oil, honey, garlic, Italian herbs, salt, and pepper until well combined.
03 - Place the chicken breasts in the prepared baking dish. Pour the balsamic marinade over the chicken, turning to coat evenly on all sides.
04 - Bake uncovered for 20 minutes to develop base flavor and begin cooking the chicken through.
05 - Remove the baking dish from the oven. Top each chicken breast with tomato slices followed by mozzarella cheese.
06 - Return to the oven and bake for an additional 8-10 minutes, or until the chicken reaches an internal temperature of 165°F and the cheese is melted and bubbly.
07 - If desired, broil for 2-3 minutes to achieve a golden, lightly browned top on the cheese.
08 - Let the chicken rest for 3 minutes before serving. Garnish with fresh basil leaves and drizzle with additional balsamic glaze if desired.