Boil water in a medium stockpot and cook noodles for 3 minutes. Drain noodles and set aside.
In a large stockpot, heat up stock at a low boil. Throw in carrots and celery
Add mushrooms and scallions
Add diced tofu.
Add baby bok choy. Stir soup for a few more minutes and serve.
You may want to add salt and seasonings.