Onions add zesty flavor to lots of different foods, like soups, salads, omelets, and much more! But sometimes, chopping them up can make your eyes water – ugh! Why does that happen, anyway? We asked chef and cookbook author Kenji Lopez-Alt to help us find the answer.

Got a question ON-ion your mind? Send it to us at BrainsOn.org/contact and we’ll find such a great answer, you’ll weep for joy!