Leeks (Bara Hara Pyaz): How to Clean the Grit and Cook Them

Slice a leek into rounds, give them a quick rinse in a colander, and you’ll probably still crunch on sand at dinner. The fix? Slit first, rinse second. This guide covers how to clean and store leeks, what a leek actually is (think of a giant, gentler hara pyaz), which parts to eat, and three easy ways to cook it, from aloo leek soup to a desi leek and anda bhurji.

What leeks are, and leeks vs spring onion

A leek is an onion-family vegetable, in the same group as pyaz, lehsun and hara pyaz, but it never forms a proper bulb. Instead it grows a long, thick white shaft that turns pale green and then fans out into flat, dark green leaves. Farmers pile soil up around the stem as it grows so that the lower part stays white and tender, and that soil works its way down between the layers. Hence the grit.

There’s no settled Urdu or Hindi name, which is why shops just call it leek and why “bara hara pyaz” (big spring onion) is the closest everyday description you’ll hear, and you’ll mostly find it in supermarkets and a few city sabzi stalls through the cool months, roughly November to March.

How the three compare

Spring onion (hara pyaz) is thin, sharp and fine raw in a raita or on top of a chaat, whereas a leek is many times thicker, much milder and a little sweet, and it really comes alive when it’s cooked slowly in oil or butter until it goes soft and silky, not when you chop it raw into a salad. Ordinary onion is the strongest of the three. Swap leek in wherever you’d use a lot of onion for a sweet, gentle base, like soup or a light sabzi, and use about double the volume. For the spring onion and green garlic side of the family, see hara pyaz and lehsun patta.

How to choose good leeks at the store

1. Stand it up. Straight and firm. Floppy is old.
2. Check the white part. The longer the white and pale green section, the more of the leek you’ll actually eat, so look for a long stretch of clean white with no brown or slimy patches and skip the ones that are mostly dark green leaf.
3. Measure with your fingers. Medium thickness, roughly 2.5 to 4 cm across (about the width of two fingers), is ideal. Very fat leeks can be tougher.
4. Look at the tops. Dark green, fresh and upright. Yellow, dry or slimy tops mean they’ve been sitting.
5. Feel the centre. Squeeze near the top of the white. A hard, woody core means the plant had started sending up a flower stalk, and that core stays tough however long you cook it.
6. Roots. Trimmed, pale roots are fine. Blackened or rotten ones aren’t.

Leeks are often sold trimmed and wrapped in pairs. Fine. Just check under the plastic.

How to clean and store leeks without the grit

Two methods: the first for leeks you want to keep in long pieces, and the second, which is quicker and a little more thorough, for anything you’re going to chop into rounds anyway.

Method 1: slit and fan

1. Cut off the root end, taking as little as possible, about 5 mm.
2. Cut off the dark green top where it starts to fan out and feel tough. Keep it for stock.
3. Slice the leek in half lengthwise, stopping about 2 cm short of the root end if you want the layers held together.
4. Hold it under cold running water, root end up, and fan the layers open with your thumb like a deck of cards. Rinse for 20 to 30 seconds, checking the pale green part, where the grit hides most.
5. Shake dry and slice.

Method 2: slice, then swish

1. Trim the root and dark top, then slice the leek into 1 cm rounds or half-moons.
2. Drop them into a big bowl of cold water and separate the rings with your fingers.
3. Swish, then leave 2 minutes. The leeks float; the sand sinks.
4. Lift the leeks out with your hands or a slotted spoon; don’t pour them into a colander, or the grit goes straight back on top, and repeat once if you still see sand in the bottom of the bowl.

Plain water is all it takes. No salt, vinegar or soap, and our guide to washing fruit and vegetables explains why those extras don’t help.

Storing leeks in the fridge and freezer

• Whole, unwashed: loosely wrapped in a plastic bag or damp cloth in the vegetable drawer, about 1 to 2 weeks. Keep them away from things that soak up smells, like butter, milk or cut fruit.
• Cleaned and sliced: in a closed box with a paper towel, 2 to 3 days.
• Freezer: slice, wash, dry well and freeze flat in a zip bag. No need to blanch. Cook them from frozen within roughly 3 months; thawed leeks turn soft, so they suit soups and sabzi only.
• Cooked: 3 to 4 days in a covered box in the fridge.

How to know if a leek is bad: slimy outer layers, a sour or rotten smell, or a mushy, brown inside. Papery outer layers? Normal.

What leeks do for you, honestly

One medium leek (about 90 g of the edible part) has roughly 55 calories, some fibre, a good amount of vitamin K, and useful folate and vitamin C. Like onion and garlic, leeks carry fructans, a kind of fibre that feeds gut bacteria, which is good for most people and exactly why some get gassy. Here’s a genuinely useful detail for anyone with IBS: the white part is high in these fructans, while the green leaves contain far less, so people who react to onion often manage the green part of the leek better. If you’re not sure whether it’s IBS or plain gas, our IBS or just gas checklist helps sort it.

What leeks aren’t: a hair growth food, a testosterone food or a weight loss food. The claims online don’t hold up. They’re a mild, cheap-to-use flavour base that lets you cut down on oil and salt because the leek does so much of the work.

Three ways to cook leeks, desi and otherwise

Aloo leek soup (serves 4)

Melt 1 tbsp butter with 1 tsp oil. Add 2 cleaned, sliced leeks (white and pale green) and a pinch of salt, cover and let it sweat gently for 10 minutes until soft and sweet, not browned. Add 2 medium peeled, cubed potatoes, 1 litre water or stock and 1 garlic clove. Simmer 20 minutes, blend, and finish with black pepper, a splash of milk and a pinch of roasted zeera.

Leek and anda bhurji (serves 2)

Heat 1 tbsp oil, add 1 sliced leek and 1 chopped green chilli, and cook 5 minutes until soft. Stir in a chopped tomato with a pinch each of haldi and red chilli, salt it, and give it 2 minutes. Pour in 3 beaten eggs and stir gently until just set, then eat it straight away with a hot paratha, because leek bhurji goes watery if it sits.

Leek and chana dal sabzi (serves 3)

Soak 1/4 cup chana dal for 1 hour. Crackle 1/2 tsp zeera in 1 tbsp oil, add 3 sliced leeks, the drained dal, 1/2 tsp dhania powder, 1/4 tsp haldi and salt, plus 1/2 cup water. Cover and cook 15 to 20 minutes on low heat until the dal is tender but whole, the same way many homes cook hara pyaz with dal.

Surprising facts about leeks

• The leek is a national emblem of Wales, and people there wear one on St David’s Day.
• Leeks, like onions and garlic, are toxic to dogs and cats. Don’t feed pets leftover leek soup.
• Gardeners can grow a new leek from the root end of a shop-bought one, set in a glass of water, though it gives you soft green shoots rather than a full-size leek.

More vegetable buying and storage guides are in our Fruits and Vegetables hub.

Leek questions, answered