I render any solid fat trimmings and re-melt my saved grease, then combine all that in my food processor (making sure the fat’s not too hot!) with cornmeal and flour and some peanuts and crushed red pepper (to discourage squirrels). I pack it into molds, either from store-bought blocks of suet...
I was just coming back to edit my previous post to say I had done some exploring and figured that out!
So far I have not felt the need, but now I am prepared should the desire occur. 🙈