grandma's chicken noodle soup

This is Ryan's grandma's recipe, I was lucky enough to get a couple of keepers from her before she passed away in 2007

2 1/2 cups wide egg noodles

1 teaspoon vegetable oil
12 cups chicken broth
1 1/2 tablespoons salt
1 teaspoon poultry seasoning
1 cup chopped celery
1 cup chopped onio
1/3 cup cornstarch
1/4 cup water
3 chicken breasts

Bring a large pot of lightly salted water to a boil. Add egg noodles and oil, and boil for 8 minutes, or until tender. Drain, and rinse under cool running water. In a large saucepan or Dutch oven, combine broth, salt, and poultry seasoning. Bring to a boil. Stir in celery and onion. Reduce heat, cover, and simmer 15 minutes. In a small bowl, mix cornstarch and water together until cornstarch is completely dissolved. Gradually add to soup, stirring constantly. Stir in noodles and chicken, and heat through.