If needed cut peppers and celery a few hours ahead then combine in a sealable bag or cover bowl and refrigerate until you use.
Yes you must use dark sesame oil the other won't work. Broth used is optional use only one of the broths listed. Do NOT use both. If the dark sesame oil is too strong [this is a strong oil taste]reduce it to taste with light cooking sesame oil.
In boil water cook the pasta until tender. Drain well.
Now in no stick skillet or wok, heat the semsame oil until hot but not smoking over medium heat. Add the scallions, garlic and ginger and stir fry until scallions are tender crisp about 1 minute.
Add the peppers, celery and mushrooms and stir fry until peppers and celery are tender crisp. About 4 minutes.
Add pasta and stir fry until lightly crisp aobut 1 minute.
In small bowl combine the rest of the ingredients along with rest of oil. Pour into skillet and cook stirring slightly for a minute until thickened.
For Vegans and Vegetarians you are cooking for use the meatless option. And no chicken is not Vegetarian.