I bought a whole pig with a friend. Along with the meat, we each received several bags of skin with ~1/2" of fat.
I figured I'd render the fat for tamales, pies or perhaps make some soap. When a sample batch cooled, I found that another by-product of this is gelatin.
I'll end up with over a gallon (maybe two) of pretty stiff gelatin. Definitely stiffer than any chicken stock I've made. I'd rather not toss it.
What can I do with it? There are no bones involved. Stock?