In a small saucepan, heat bouillon and water for 1 minute; stir well. Stir in the salt, garlic powder, pepper and 1 teaspoon oil., In a large nonstick skillet or wok, stir-fry the broccoli, carrots, onion and celery in remaining oil for 2-3 minutes. Add the bouillon mixture; cook and stir for 3 minutes. Add zucchini and red pepper; stir-fry for 3 minutes. Add mushrooms and cabbage; stir-fry 1-2 minutes longer or until crisp-tender.