Heat olive oil in a large pot over medium heat. Add onion, carrots, and celery, and sauté until softened (about 5 minutes).
Stir in the minced garlic and cook for another 30 seconds until fragrant.
Pour in the chicken broth and add the shredded chicken, dried thyme, parsley, salt, pepper, and bay leaf. Bring to a gentle boil.
Reduce the heat and let it simmer for 15 minutes to allow the flavors to develop.
Add the egg noodles and cook according to the package instructions (usually about 6-8 minutes) until tender.
Remove the bay leaf, stir in lemon juice if using, and adjust seasoning as needed.
Serve hot, garnished with fresh parsley if desired. Enjoy!