Those aren’t super-sized scallions, they’re leeks! Having a very small bulb and a long white cylindrical stalk of superimposed layers that flow into green, tightly wrapped, flat leaves, these beauties have a flavor that is reminiscent of shallots but sweeter and more subtle. Leeks are an excellent source of vitamin K, as well as manganese, vitamin B6, copper, iron, folate, and vitamin C. Additionally they serve as a source of vitamin A (in the form of carotenoids), dietary fiber, magnesium, vitamin E, calcium, and omega-3 fatty acids