In the slow cooker, combine ground chicken, crushed tomatoes, carrots, onion, celery, garlic, tomato paste, bay leaves, salt, crushed red pepper flakes, and water. Using a wooden spatula, break up the ground chicken and mix it into the sauce and vegetables.
Cover and cook on high until vegetables are tender and chicken is cooked through, about 4–5 hours.
Cook your favorite whole-wheat pasta according to the packet instructions. Drain and serve ½ cup of cooked pasta topped with ½ cup of sauce.