My Grandmother passed away when I was a little over knee high.. but I remember her Potato Croquettes which did not have a breadcrumb coating.
My father, who claims to have watched my Grandmother many, many times, says that she took a handful of regular mashed potato, stuck a piece of mozzarella cheese in it, shaped it into a cylinder and fried it.
I have tried doing it many, many times. I can not do it. I tried mixing egg into the potato.. It just falls apart.
I was hoping someone else's grandmother did something similar.. and that you know a little more about it.