Peel the onion. Wash the chicken and cook with onion and bay leaf in plenty of salted water for 1 1/2 hours. In the meantime, clean, wash and slice the vegetables. Cook the pasta in boiling salted water for ten minutes and drain.
Wash the herbs and chop finely. Take the chicken out of the broth and let it cool down a bit. Bring the stock back to the boil. Add vegetables and cook for ten minutes. Add peas to the soup five minutes before the end of cooking time.
Peel the skin from the chicken, remove the meat from the bones and cut into pieces. Add herbs, noodles and chicken meat to the soup. Season to taste with salt and pepper.