Grilled Chicken Caprese

This is a delicious, low-calorie main dish:
Grilled Chicken Caprese
1 lb boneless, skinless chicken breasts
Mix some balsamic vinegar and oil to make a dressing, or buy a balsamic vinegar dressing.
1 box grape tomatoes, halved
1 teaspoon minced garlic
1/2 cup fresh basil, torn
1 Tablespoon extra virgin olive oil
2 Tablespoons balsamic vinegar
Fresh mozzarella slices

Place chicken in a gallon-sized zip bag.  Add Balsamic and oil or salad dressing to cover.  Marinate for 4-24 hours.
In a bowl, combine tomatoes, garlic, basil, olive oil and balsamic vinegar.  Add salt and pepper to taste.
Grill the marinated chicken on a grill at medium heat.  Close the lid and cook about 7 minutes per side, depending on thickness of the meat.  During the last two minutes, put a slice of Mozzarella on each chicken breast.  Top each breast with the tomato/ basil mixture.