Onion Skins and Garlic Skins - I have never tried this myself, but I was told to wrap in foil and let smolder rather than direct contact with the flame.

• 皮洋葱和大蒜皮 -我从来没有试过这种自己，但我被告知在铝箔包裹，让熠，而不是直接接触火焰。