In a large wok heat vegetable and chili oil over fairly high heat. Add the onions and stir-fry for 1 to 2 minutes or until they begin to soften.
Add carrots, zucchini, red pepper and broccoli. Stir-fry for 2 to 3 minutes. Add mushrooms, bok choy, snow peas, sugar, soy sauce and vinegar. Stir fry for 1 to 2 minutes. Sprinkle with cashews and serve.