Prepare your ingredients by washing and slicing the vegetables, dicing the onion, mincing the garlic, and slicing the carrots and celery.
In a large pot, heat the olive oil over medium heat. Add the chicken breasts and cook for 5-7 minutes on each side until golden brown. Remove and set aside.
In the same pot, add the diced onion and sauté until translucent, about 5 minutes. Stir in garlic, carrots, and celery, cooking for another 5 minutes.
Pour in the chicken broth, add thyme, parsley, and bay leaf. Bring to a boil, reduce heat, return chicken, cover, and simmer for 20-25 minutes.
Remove chicken, shred it, and return to the pot. Add egg noodles and cook according to package instructions, about 6-8 minutes. Season with salt and pepper, and remove bay leaf before serving.