I have not heard of a potato troll, but here is a DIY for an evergreen one: https://hollygrace.ca/2018/11/27/diy-evergreen-gnome/
Hello this link might be helpful.
How to Make a Tomato Cage Christmas Gnomes DIY | Hometalk
Hi Nancy, here are a couple of ideas, hope they help you,
This made me laugh! Share how it turns out!!
This one is not a potato gnome but it is cute. https://www.hometalk.com/44031205/this-is-how-i-make-easy-christmas-socks-gnomes