Preheat oven to 425 degrees F. Spray a 9 x 13-inch baking dish with cooking spray.
Place frozen mixed vegetables, frozen diced onion, celery, minced garlic, parsley and bay leaf in the prepared baking dish. Toss to combine.
Add raw, diced chicken to the dish. Toss to combine with the vegetables.
In a separate bowl, whisk together condensed soup, water, thyme, salt and pepper. Pour sauce over chicken and vegetables. Stir to combine.
Cover tightly with foil.
Bake for 30 minutes, stir, cover again, and return to the oven for 15 more minutes (or until chicken is cooked through). Remove bay leaf. Stir, and serve over noodles, rice or biscuits. Garnish with fresh parsley.