My wife is a vegetarian but was sick one day and was craving some soup. This is what I came up with. I've found that the smaller you chop the seitan, the better the results.
This recipe is vegan, but I've also made it for myself substituting with one can of canned chicken, 5 cans chicken stock, and 2 tablespoons of butter and it turned out great, too.
If you can't locate vegan noodles, the shirataki noodles make a great substitute, but remember to rinse them in water and slice them in half with scissors before adding to the soup.
The cayenne pepper really helps with a stuffy nose, but can be safely omitted without sacrificing flavor. As with all recipes, taste throughout, adjust spices if needed as dry spices lose their potency over time.