Season chicken with salt and pepper, to taste. Place chicken into a 6-qt slow cooker.
Stir in chicken stock, onion, carrots, celery, garlic, thyme, rosemary and bay leaves; season with salt and pepper, to taste. Cover and cook on low heat for 6-8 hours.
Remove chicken from the slow cooker and shred, using two forks.
Stir in pasta and chicken into the slow cooker. Cover and cook on low heat for an additional 30-40 minutes, or until pasta is tender.
Stir in lemon juice and parsley; season with salt and pepper, to taste.
Serve immediately.
Notes
Use the right size crockpot. A 6-qt slow cooker is ideal for this recipe. For a smaller slow cooker, simply half the recipe with the same cook time.
Use good-quality stock. The better quality your stock, the better your soup. Many brands love to pack in the salt so always opt for unsalted or a lower-sodium variety. Homemade stock is even better.
Let the noodles cook with the soup. The pasta does not have to be pre-cooked prior to adding to the slow cooker. The beauty of this recipe is its ease - no extra pot needed here. Go ahead and throw in your uncooked, broken spaghetti noodles, letting it infuse all the lovely flavors.
Add freshly squeezed lemon juice. Lemon juice will elevate your chicken noodle soup, adding a fresh, bright flavor and balancing out all the saltiness and richness of the soup.
Avoid overcooking your chicken noodle soup. Even with its gentle heat feature, you can still overcook chicken noodle soup in the slow cooker. The chicken will dry out, and the vegetables will turn to mush. Do not leave the slow cooker on longer than necessary.