- In a large pot, combine chicken breasts, onions, minced garlic, bay leaf, and water or chicken broth. Bring to a boil. 
- Boil until chicken can be easily pulled away from the bones, about 30-45 minutes. 
- Remove chicken from pot and set aside to cool until safe to handle. 
- Add chopped celery and carrots to the broth and bring back to a simmer. 
- While vegetables cook, shred or cut the cooled chicken into bite-sized pieces. 
- Return chicken pieces to the pot with the simmering vegetables. 
- Continue simmering until vegetables are almost tender, about 10-15 minutes. 
- Add dried egg noodles to the pot and simmer until pasta and vegetables are fully cooked, about 8-12 minutes. 
- Season with salt and pepper to taste. 
- Remove bay leaf before serving. Sprinkle shredded cheese on top if desired and stir gently.