Heat a large pot over medium heat.
Add the chopped onion and sauté until translucent.
Stir in the garlic and cook for another minute.
Add the diced celery and sliced carrots; cook for 5 minutes.
Pour in the turkey broth and bring to a boil.
Add in the shredded turkey, thyme, bay leaf, salt, and pepper.
Reduce heat and let it simmer for 20 minutes.
Taste and adjust seasoning as necessary.
Remove the bay leaf before serving.
Garnish with fresh parsley before ladling into bowls.