Leek

What Is a Leek?

Leek (Allium ampeloprasum) is a winter vegetable in the allium family, known for its long white stalk and dark green leaves. It is related to onions and garlic, but its aroma and flavor are much milder.

The white stalk is the most commonly used part; the green leaves are tougher but can be used in soups. Leeks tolerate cold weather and are at their most flavorful in winter.

Leek Nutrition Facts

Leeks provide about 61 kcal per 100 grams and contain slightly more carbohydrates than other alliums. They are a source of vitamin K and iron, and also contain folate and vitamin C.

What Are the Benefits of Leeks?

With their fiber and vitamin K, leeks are a useful part of a balanced diet. Research into the sulfur compounds common to alliums is ongoing.

This is general information; leeks are a food, not a medical treatment.

How to Choose Leeks

Fresh leeks have firm white stalks and vivid green leaves; yellowed or soft stalks are signs that they are no longer fresh.

• The transition from white to light green should be long; this indicates a crisper stalk.
• The stalk should feel firm and crisp when squeezed, not soft like a sponge.
• The root end should be moist, and the cut surface should look fresh.

How to Store Leeks

Leeks keep fresh for 1–2 weeks in the refrigerator in a loose bag, stored upright. Chopped leeks can be frozen for several months, but their texture softens, so they are best used in cooked dishes.

How to Use Leeks in the Kitchen

Leeks are a main ingredient in olive-oil dishes, add a flavorful base to soups, and complement dishes made with ground meat. Because soil collects between the layers, split the stalk lengthwise and wash it in plenty of water.

How to Clean Leeks

After trimming the root and dark green ends, split the stalk lengthwise and separate the layers under running water. This method thoroughly removes soil trapped between the rings.

Recipes That Use Leeks

Popular leek dishes include leeks cooked with olive oil, leek soup, leeks with ground meat, and leek gratin. Leeks are also often used as a flavorful base in vegetable sauces.

Frequently Asked Questions

What are leeks good for?

Leeks are rich in vitamin K, iron, and fiber, and are a useful part of a balanced diet. They are a food and are not claimed to cure any disease.

Can you use the green part of a leek?

Yes. Although the dark green leaves are tougher, they can be finely chopped and used in soups or recipes where the liquid is strained.

Can you eat leeks raw?

Very thinly sliced fresh leeks can be used raw in salads, but they are generally eaten cooked.

Why are leeks gritty?

As leeks grow underground, soil gets between their layers. That is why they should be split lengthwise and washed in plenty of water with the layers opened up.

Are leeks and onions the same?

No. Both belong to the allium family, but leeks have a milder, slightly sweet aroma and a long cylindrical stalk, while onions are small, layered bulbs.