Preheat oven: 350 degrees. Dice chicken in bite size cubes. Marinate chicken in the Italian dressing and Old Bay seasoning. Saute until 3/4's cooked. Drain off excess juice and place in chaffing dish. Place peppers, onions, mushrooms and garlic on top of the chicken. Cover with homemade Tony N' Tina's Marinara Sauce (about 1 1/2 half quarts). Bake for about 30 minutes.
Saute onions and olive oil until onions are translucent (about 3 minutes). Add in diced tomatoes, then add tomato puree. Add the remaining ingredients and 2 cups water. Let simmer for about 6 hours.
Recipe courtesy of Tony N? Tina?s Wedding, Venice Plaza, Philadelphia, PA