A leek is a vegetable in the Allium genus, which also contains onions, green onions, garlic, shallots, scallions, and chives.
Instead of forming a bulb (like an onion), the edible part of a leek is a made up of a cylindrical bundle of leaf sheaths. Because of its celery-like shape, this bundle is sometimes called a stem or stalk. However, that is incorrect.
An ancient food, the leek’s origins can be traced back to central Asia. It was also commonly eaten by the Egyptians, Greeks, and Romans.
Perhaps more than any other culture, however, the leek is associated with the Welsh.