If you are using the marinade, allow the chicken to marinate for at least 2 hours. It is much better if left to marinate overnight. If you are not marinating, season both sides of the chicken with salt. In a large bowl, combine the diced tomatoes, grated garlic, 1/2 tsp salt, black pepper, julienned basil and olive oil. Grill the chicken on preheated, well oiled grates on medium-high heat. The cook time will depend on the size of the breasts, but the internal temperature needs to reach 165 degrees. Remove from the grill and allow the breasts to rest for a couple minutes.Spoon the tomato, basil topping over each piece of chicken. Drizzle the chicken with balsamic glaze and/or top with parmesan if desired.