In a large skillet or Dutch oven over medium heat, brown chicken in 1 tablespoon of oil; set chicken aside. Add remaining oil to skillet; saute mushrooms, garlic, tomatoes, eggplant, green pepper, zucchini and onion for 10-15 minutes or until vegetables are tender. Add remaining ingredients; bring to a boil. Return chicken to skillet. Reduce heat; cover and simmer for 30-40 minutes or until chicken juices run clear. Remove bay leaf before serving.