IN SEASON - October, November
Leeks are related to onions, shallots and scallions to which they bear a resemblance. They look like large scallions having a very small bulb and a long white cylindrical stalk of superimposed layers that flows into green, tightly wrapped, flat leaves.
Keep leeks refrigerated for up to one week in your crisper drawer.
When preparing, trim white part and discard greens. Leeks can be quite sandy, so careful washing is important.