Start by placing the boneless, skinless chicken breasts at the bottom of the slow cooker, ensuring they are evenly spread out.
Pour 4 cups of chicken broth and 2 cups of water over the chicken, allowing it to fully submerge.
Carefully add the chopped onion, sliced carrots, sliced celery, and minced garlic into the slow cooker, distributing them evenly for maximum flavor infusion.
Sprinkle the dried thyme and dried basil over the mixture, then season with salt and freshly ground black pepper to taste.
Place the lid on the slow cooker and cook the mixture on the low setting for 6-7 hours, or on high for 3-4 hours, until the chicken is thoroughly cooked and tender.
After cooking, remove the chicken breasts from the slow cooker and place them on a cutting board. Using two forks, shred the chicken into bite-sized pieces. Return the shredded chicken back to the soup in the slow cooker.
Stir in the egg noodles, then cover the slow cooker again and cook on high for an additional 30 minutes, or until the noodles are fully cooked and tender.
Before serving, taste the soup and adjust the seasoning with more salt and pepper as needed.
Ladle the soup into bowls, and garnish each serving with a sprinkle of fresh chopped parsley for a vibrant touch.
Notes
Feel free to add more vegetables or adjust seasonings to taste.