In a large bowl stir tomatoes, onions, parsley, & basil together until well combined.
Cut slits on the tops of the chicken. Go half way through. Place in a casserole dish.
Using half of the mixture, spoon into the cuts & over the tops of the chicken.
Bake for 45 minutes.
To make the sauce, combine the vinegar & brown sugar in a sauce pan. Bring boil over medium heat. Cook at medium-low for 15-20 minutes or until the mixture coats the back of a spoon.
Add the rest of the mixture to the chicken & bake another 10 minutes.