Cook the noodles if you wan't to add them to your soup.
Strain the stock through a fine mesh metal strainer with a bowl underneath to catch all the stock. Discard the veggies and set the stalk aside.
Place the now empty stock pot back on the stove and heat over medium heat. Add the ghee and chopped onion, leek, celery, carrots, and some salt and pepper. Saute for about 10 minutes until the veggies are soft.
Add the minced garlic and cook for another minute stirring frequently
Add the chicken, noodles and stock to the pot. You may not need all of the stock added back to your soup. Or you may need to add a little water in addition to all the stock, depending on preference.
Let the soup simmer for about 10 minutes, until vegetables are soft and chicken is cooked through. Taste for seasoning and add more salt if needed.
Turn the heat off and add the dill, parsley, and lemon zest.
Ladle the soup into bowls and top with fresh squeezed lemon juice and sour cream if desired.