Place tomatoes with liquid in medium bowl. Add garlic, stuffing mix and water; stir just until stuffing mix is moistened. Stir in additional ingredients of mushrooms, onions, basil, balsamic vinegar and salt and pepper. Set aside.
Mix together 1 teaspoon garlic powder, 1/4 teaspoon salt and 1/8 teaspoon pepper. Sprinkle chicken with mixture; place chicken in a greased 13x9 inch baking dish.
Top chicken pieces with artichokes and stuffing mixture then sprinkle with mozzarella and parmesan cheeses. Bake for 30 minutes or until chicken is cooked through.
Garnish with basil sprigs and red pepper flakes if desired.