Onions have a famously long shelf life, and whole red, white, and yellow onions are easy to store—just pop them in a mesh bag or basket in a cool, dark, and dry location. You should avoid storing ...

Credit: iStockphoto Slip whole onions, skin and all, into the freezer for about 20 minutes before cutting. The cold slows the release of syn-Propanethial-S-oxide, the sulfur-based irritant that ...