Contain anthocyanins, a type of antioxidant.
Contains sulfur, which contributes to the health of cells.
May help maintain normal blood sugar levels.
Choose firm dry onions with shiny, tissue-thin skins. "Necks" should be tight and dry. If they look too dry or discolored or have soft, wet spots, they aren't fresh.
- Using a sharp chef's knife, slice about a half an inch off the top of the onion and discard.
- Turn the onion to rest on this flat end and slice in half vertically and peel off the layers.
- Remove and discard the skin.
- Chop vertically, then take one onion half and lay it flat on your cutting board.
- Holding the root end, carefully cut vertically, making sure not to slice all the way through.
- Leave the root side intact to make chopping easier.
- Chop horizontally. Rotate the onion and slice vertically down through the onion, still leaving the root end intact.
- Discard the root end and repeat with the remaining half of the onion.