01 - In a large pot, sauté diced onion, minced garlic, sliced carrots, and sliced celery over medium heat until vegetables are softened, about 5 minutes.
02 - Pour in chicken broth, increase heat to high, and bring mixture to a gentle boil.
03 - Add egg noodles to the boiling broth and cook uncovered for 6-8 minutes, or until noodles are just tender.
04 - Reduce heat to low, stir in cooked shredded chicken, and continue to cook until chicken is heated through. Season with salt and black pepper to taste.
05 - Ladle soup into bowls and sprinkle with freshly chopped parsley before serving.