Brown meat in a large skillet. Drain off fat, and rinse meat using a colander.
Transfer meat to a large cooking pot. Stir in onion, garlic, and ginger. Add water, and bring soup to a boil. Stir in bok choy. Reduce heat ,and simmer for about 3 minutes.
Stir in noodles. Simmer 3 minutes longer, or until bok choy and onions are crisp tender and noodles are soft. Stir in seasoning packets, oil, and soy sauce.