Onions, one of the oldest vegetables, are eaten in nearly every part of the world. In the late winter and spring, onions are bought and eaten fresh-from-the-ground. Don’t confuse a spring onion with its close counterpart, the long, thin scallion. Unlike leeks or scallions, they bulge near the root. These seasonal onions are milder than regular onions yet zippier and sweeter than green onions