Cut chicken breasts in half; salt and pepper. Place in crock pot. Turn on low. Add Navy beans, tomatoes, chicken broth, carrots, cabbage, peas, onion and seasonings. Cover and cook at least 8 hours; or on high for 4 hours.
After it has cooked, remove the bay leaf and chicken. Discard the bay leaf and shred the chicken and replace into the stew. Salt and pepper to taste.