Prep your ingredients by dicing the onion, slicing the carrots and celery, and mincing the garlic.
Heat olive oil in a pot over medium heat. Add chicken pieces and cook until no longer pink, about 5-7 minutes. Remove and set aside.
In the same pot, sauté onion, carrots, and celery for about 5 minutes until tender. Add garlic and cook for an additional minute.
Pour in chicken broth and bring to a boil. Add shredded chicken, thyme, parsley, bay leaf, salt, and pepper. Reduce heat and simmer for 15 minutes.
Add egg noodles and cook according to package instructions, about 6-8 minutes. Stir in frozen peas and heat through for 2 minutes. Squeeze in lemon juice if desired.