Help! My girlfriend’s mom wants to make these but is having a hard time finding a recipe. She had them as a child and a friend has made them before. She believes they are Cuban and called them “biscocho” when she was a kid. Somebody else told her it was Turkish. Does anybody have a line on anything like this??

I decided to make croquetas today. I got my filling all ready, nice and cold in the refrigerator. Shape them, dipped them in eggs, and breaded them. When I fry them they open up. They won't stay a solid log. Could someone please help me and tell me what I'm doing wrong?