1. In a large pot, heat a bit of oil over medium heat. Add the chicken breasts and cook until browned on both sides, about 5-7 minutes per side. Remove and set aside.
2. In the same pot, add the onions, carrots, and celery. Cook until softened, about 5 minutes. Add the garlic and cook for another minute.
3. Pour in the chicken broth and bring to a boil. Add the chicken breasts back into the pot. Reduce heat and let simmer for 20 minutes.
4. Remove the chicken breasts, shred them with two forks, and return the shredded chicken to the pot.
5. Add the egg noodles, thyme, parsley, salt, and pepper. Cook for another 10 minutes or until the noodles are tender.
6. Adjust seasoning if necessary and serve hot.