Preheat grill pan or non-stick skillet to medium heat on stove top. Spray with cooking spray.

To make Bruschetta Topping: In a medium bowl, combine tomatoes, basil, garlic, salt and balsamic vinegar. Toss gently together. Store in refrigerator until ready to use.

For grilled chicken: Combine balsamic vinegar and olive oil in a bowl. Season both sides of chicken with pinches of salt and place on grill. Brush top sides with balsamic mixture. Cook for 4-5 minutes and then flip chicken. Brush other side with balsamic and cook another 4-5 minutes or until cooked through. Place one piece of fresh mozzarella on each chicken breast and continue to cook until slightly melted.

Remove chicken from pan then place on individual plates. Top each chicken breast with desired amount of bruschetta topping. Serve immediately.