Leek is part of the onion family, and hence it used similarly in cooking. Best sauteed, roasted or grilled, leeks provide a sweet and more mild onion-like flavour.
Leeks have a mild, onion-like taste. In its raw state, the vegetable is crunchy and firm
Leeks are a good source of iron, vitamin C and folate. Four ounces of raw leek contains about 75 calories.