PLACE chicken broth, potatoes, celery, onion and pepper into slow cooker. Cook on low for approximately 6 hours until vegetables are tender.
ADD bacon to the slow cooker.
COMBINE cream, VELVEETA cubes, cheese and yogurt in a saucepan on the stove. Cook over low to medium heat until hot.
POUR cheese mixture into slow cooker, stirring constantly.
COMBINE cornstarch and cold water in a separate bowl, mixing well. Slowly add to slow cooker. Cook 30 more minutes are serve.