SHRED the leftover turkey.
PEEL and CUBE the potatoes.
SLICE the leeks. Soak them in a bowl of water for a few minutes. Swish them around to remove any dirt. Then drain them.
CHOP the celery.
MINCE the onion and garlic.
ADD the olive oil and onion to a cold stock pot. Turn on medium heat.
SWEAT the onion slowly and cook it for 3 to 4 minutes until it begins to soften.
ADD the garlic and cook for 1 minute.
ADD the celery and leek and cook for 2 to 3 minutes more until they begin to soften.
POUR in the broth, turkey, potatoes, sage, oregano, thyme, rosemary, and parsley.
STIR to combine.
COVER and bring to a boil.
LOWER HEAT and SIMMER for 10 to 15 minutes, or until the potatoes are soft, but not mushy.
REMOVE the soup from the heat and add the fresh lemon juice. Stir to combine all ingredients.
TASTE and add salt and pepper. Adjust seasonings as needed.
SERVE with dinner rolls, bread sticks, or cornbread.