Whether you enjoy onions for the taste or the crunch, do not underestimate the nutritional value of the onion. In addition to healthful fiber, onions serve up vitamins and minerals useful for meeting your nutritional goals.

Native to Asia, green onions -- also called scallions -- should make make regular appearances in health-conscious kitchens. Like white onions, they add pungent flavor to your dishes, though green onions are milder, so even if they're used raw, they won't overpower the taste of your dish.