To a mason jar or small bowl, add the vinegar, oil, lemon juice, basil, parsley, thyme, garlic, salt, and pepper. Shake or whisk together until combined.
Add the chicken breasts to a large zipper-top bag. Pour in the marinade. Seal the bag and massage the chicken to ensure the chicken is fully coated with the marinade.
Refrigerate for 2-3 hours. Grill over medium heat 5-7 minutes per side until internal temperature reads 165℉. Remove the chicken and let rest for 5 minutes.
Caprese Salad
Meanwhile, add the grape tomatoes and mozzarella to a large bowl. Slice the chicken and add to the bowl along with the fresh basil. Toss gently to combine. Arrange on a serving platter or in a bowl and drizzle with extra balsamic vinegar and olive oil. Serve.
Notes
Optional - reserve a small amount of the marinade (before adding the raw chicken) to use as a dressing for the salad.
Use an instant-read thermometer to ensure the chicken is cooked to an internal temperature of 165°F.