Most of the nutrients in fruits and vegetables are found in their skins. Of course, not all of those are considered edible, but that doesn’t make them useless.

We’ve found 40 ways to get some use out of your food waste and some of them are sure to surprise you.

One thing you’ll want to be mindful of if you do use peels and skins is that they should be thoroughly washed first. This removes any residue from the outside (whether it’s dirt, something sprayed on the item, or just a grimy fingerprint) that could make you sick.