The StufZ burger press was recently reviewed by review site, TV Stuff Online, and they offered a number of ingredients one could use to make their own stuffed burger with StufZ.
Peas and carrots
Mushrooms and swiss cheese
Sun dried tomatoes
Mac and cheese
Ground chicken and ham
The review also provides some information about the StufZ commercial, where to buy StufZ and they even go over some StufZ FAQs.
Read their full StufZ review and happy Stufz-ing!