1. Gather the ingredients.
2. Bring a large pot of lightly salted water to a boil. Add egg noodles and oil, and boil until noodles are tender, about 8 minutes. Drain, rinse under cool running water, and drain again.
3. Bring broth, salt, and poultry seasoning to a boil in a Dutch oven. Stir in celery and onion; reduce the heat, cover, and simmer until vegetables have softened, about 15 minutes.
4. Mix cornstarch and water together in a small bowl until cornstarch is completely dissolved; gradually stir into soup. Stir in noodles and chicken, and cook until heated through, 2 to 3 minutes.
5. Serve hot and enjoy!