Directions:
In a large bowl, add olive oil, balsamic vinegar, garlic, salt and pepper and whisk to combine.
Add chicken to the bowl, cover and allow to marinate in the refrigerator ½ hour up to 2 hours (not longer.).
Heat your grill to a medium high temperature, approximately 375 degrees. Grill chicken for 4-6 minutes per side until internal temperature reaches approximately 155 degrees. On the same grill, cook the halved tomatoes until they are just beginning to brown and the skin slides off easily. Remove both from heat to a baking pan. Keep grill hot.
Take the tomatoes off the pan, allow them to cool then slice them about into ¼ to ½ inch thick, pieces. Set aside.
With chicken on baking pan, place several slices of avocado on each chicken breast then cover with 2 slices of mozzarella. Put the pan back in the grill, close the lid, and heat until the mozzarella just starts to melt. Remove the pan from the grill.
Top the chicken with tomato slices, then strips of fresh Basil, then drizzle with Italian Herbs Balsamic Vinegar (or more Aceto Balsamico di Modena 4 Leaf Quality, or Aceto Riserva). Serve immediately.
Recipe adaptation by Rick