Mix together ingredients for marinade along with the chicken breasts. Marinade chicken overnight or for 2-4 hours.
Place in a glass baking dish and Bake at 375 degrees until chicken is fully cooked.
When chicken is almost done, cut grape tomatoes in half. Place into small pan or small glass baking dish. Sprinkle with olive oil, italian seasoning, salt and pepper. Bake until roasted. Add onto chicken when served.