Pour chicken broth into a large pot. Add soy sauce, chicken bouillon, salt, and white pepper. Stir and bring to a gentle simmer.
Add sliced mushrooms to the simmering broth. Cook for 5–6 minutes until tender and golden.
In another pot, boil water and cook noodles for 45 seconds to 1 minute. Drain and set aside.
Blanch bok choy for 30–45 seconds in the same boiling water. Drain and set aside.
Gently drop wontons into the simmering broth. Cook for 5 minutes, or until they float to the top.
Divide noodles and bok choy into bowls. Ladle hot broth, mushrooms, and wontons over top.
Garnish with green onions and a drizzle of chili or sesame oil before serving.
