Stacy Witscher wrote:I save onion skins and scraps for the stock pot. Granted they still get thrown away (or composted), but at least they get used.
Yes, me too. Any veg scraps that the chickens don't/can't eat go into a container in the freezer: this includes onion and garlic skins, rutabaga/potato/etc peelings, carrot ends--anything too hard or fibrous These, along with any bones we've collected (including the ones we cooked and chewed the meat off first, like pork chop bones) get saved up until I'm running low on stock.
The stock simmers for 2-3 days in the slow cooker until the bones crumble; I strain it and give all those solids to the chickens, where it disappears rapidly! They particularly like the soft bones, but seem to make short work of everything. I can't say if ducks will be as enthusiastic, but it couldn't hurt to try.
The strained stock goes into the freezer in convenient portion sizes, and is great in soups, stews, gravy, rice, and even just for boiling up some veg.
If for some reason I don't have any bones but am running low on frozen stock, I'll make a pot of veg stock. It only needs to cook about overnight (on the stovetop it would probably take an hour or less), and the result won't have the same body and richness, but is an acceptable substitute, particularly for cooking rice or other grains, or to make gravy.