Bruschetta Chicken

For the Chicken
1 pound boneless chicken breasts
1/2 teaspoon fine sea salt
1/2 teaspoon black pepper
1/2 cup balsamic vinegar
1 teaspoon extra-virgin olive oil
Bruschetta
4 tomatoes
1/2 red onion, finely diced
1 garlic clove, minced fine
1 to 2 teaspoons extra virgin olive oil
1 tablespoon balsamic vinegar
Salt, to taste
Black pepper, to taste
1/2 cup (packed) fresh basil, chopped
Optional: 1/2 to 1 cup fresh chopped mozzarella
Additional basil, for garnish
Instructions
Season chicken with salt and pepper then place chicken, balsamic, and oil into a resealable ziplock bag or glass marinating dish. Let marinade for at least 1 hour or up to overnight.
When ready to grill, grease grill and heat to medium heat.
Add chicken and let cook for 7 minutes on each side or until fully cooked through.
While grilling, combine all bruschetta ingredients in a large bowl and toss to combine.
Top chicken with bruschetta and serve immediately.