Chef Gonzalo Gonzalez Guzman of Nopalito chops onion and garlic for his chicken tostadas at home in San Francisco, California, on Monday, June 9, 2015. (Photo By Liz Hafalia/The San Francisco Chronicle via Getty Images)
You Should Be Saving Your Garlic And Onion Peels. Here's Why
By Kalea Martin
Whether used together or on their own, there's no denying that onions and garlic are versatile, but this isn't only due to their flavors. Contrary to popular belief, every part of garlic and onion is usable, so the next time you finish peeling an onion or garlic, remember to save the peels because the compost bin isn't the only place they belong.
You can turn garlic and onion peels into vegetable stock by simply stashing them in a freezer bag, and when it is filled, you'll have enough to make a stock, according to Food & Wine. Similar to cooking normal stock, to make vegetable stock from onion and garlic, add the peels to a pot of water with the peels, bring it to a boil, and simmer for at least 2 ½ hours.
If you don't often cook stews and soups or anything that requires stock, you can also utilize your leftover garlic and onion peels to make your own garlic or onion powder. Although garlic and onions impart more flavor to dishes when they're fresh rather than dried, there are many dishes where powdered is ideal, like in a dry rub or smooth sauce.