In a large pot, heat a tablespoon of oil over medium heat.
Add the chopped onions, carrots, and celery. Sauté until softened, about 5-7 minutes.
Stir in the minced garlic and cook for an additional minute.
Pour in the chicken broth and bring to a boil.
Add the egg noodles and cook according to package instructions.
Once the noodles are tender, stir in the shredded chicken.
Season with salt and pepper to taste.
Let the soup simmer for another 5 minutes to meld the flavors.
Remove from heat and stir in fresh parsley.
Serve hot, garnished with a squeeze of lemon if desired.