How to Make It
In a stockpot, combine the chicken and neck, water, chopped carrots and celery, onion, garlic, peppercorns and herbs; bring to a boil. Cover partially and simmer over low heat for 30 minutes. Transfer the chicken to a plate. Discard the skin. Pull the meat off the bones, cut into 1/2-inch pieces and refrigerate.
Return the bones to the pot. Simmer for about 1 hour. Strain the broth into a bowl and rinse out the pot. Return the broth to the pot and boil until reduced to 8 cups, 30 minutes. Season with salt.
Add the sliced carrots and celery to the broth, cover and simmer until just tender, 12 minutes. In a saucepan of boiling salted water, cook the noodles; drain and cool under running water. Add the noodles, chicken and parsley to the pot and bring to a simmer. Ladle the soup into bowls and serve hot.