1Mix Potatoes, Sauce mix from potatoes, ham, broth, celery, onion and pepper in 3 1/2- to 4-quart slow cooker. Cover and cook on low heat setting 7 hours.
2Mix half-and-half and flour. Gradually stir half-and-half mixture into chowder until blended.
3Cover and cook on low heat setting 1 hour, stirring occasionally, until thickened and vegetables are tender.