For the soup: bring stock back to a boil, add carrots, and cook for 3 minutes. Add celery and continue to cook for 5 to 10 minutes. Add egg noodles and cook according to directions on package. When noodles are done, add chicken, mushrooms, parsley, sherry and rosemary. Add Parmesan and cream, if using. Cook for another 2 minutes. Adjust seasoning, if needed, by adding seasoning salt and pepper. Enjoy along with a nice hot crusty loaf of French bread.