In a 6 quart slow cooker, add potatoes, ham, onion, carrots, and celery in separate piles. Be sure to keep them divided during cooking process.
Pour Dei Fratelli Chopped Tomatoes with Onion & Garlic and water over top. Cook on high for 4 hours.
Using a potato masher, mash potatoes for 30 seconds, or until desired consistency. Mix all ingredients together until well combined. Continue cooking for 1 hour to tenderize potatoes and vegetables. Season with black pepper and paprika.