Whisk together all of the Balsamic Marinade ingredients in a medium bowl. Remove 2 tablespoons and place in a small bowl. Store in the fridge. This will be your veggie marinade.
Pour remaining marinade in a plastic bag. Add chicken and toss to coat. Marinate in the refrigerator 6-8 hours. I let mine marinate over night.
When ready to cook, let chicken sit at room temperature for 10 minutes. Meanwhile prep vegetables and line a sheet pan with aluminum foil. Spray foil with nonstick cooking spray.
Preheat oven to 400 degrees F.
Add green beans and tomatoes to baking sheet. Add 1 tablespoon olive and 1/4 teaspoon salt to reserved balsamic marinade. Drizzle the sauce over the veggies and toss in the marinade.
Add the chicken to the pan and bake for 15 minutes at 400 degrees F.
Remove the pan from the oven and top chicken with mozzarella cheese. Bake for an additional 5 minutes or until the cheese melts.
Drizzle with balsamic reduction and garnish with fresh basil.
Enjoy!
Note: Double the recipe for a family of 4.