In a wok or large deep skillet, heat oil over medium-high heat. Stir-fry onion, celery, and carrot for about 5 minutes. Add mushrooms, pepper, and cashews, and stir-fry another 3 minutes.
Add wine, soy sauce, and cabbage. Stir well, cover, and steam until cabbage wilts slightly, about 5 minutes. Stir in sesame oil and garlic powder.
Continue stirring until cabbage is done to your liking. May season with black pepper if desired.
