Noodles do not take long to cook. Because of this you do not want to add them too your soup too early. To ensure the right cook time on your pasta you handle your pasta in several ways.
Cook your pasta to al dente and stir in just before serving. This method is really good when deciding to freeze any leftovers.
Add dry pasta to the broth and allow it to cook with the soup until the desired tenderness is reached. Remove from heat and serve!
If using homemade egg noodles be sure to adjust the cook time accordingly on if the pasta is fresh or dried. If fresh only cook pasta for 2-4 minutes.