Indian cooking
Indian cooking / Dishes / Bengali Kosha Mangsho
Bengali Kosha Mangsho (Marinated Lamb Curry with Mustard, Yoghurt and Spices)

Bengali Kosha Mangsho

Marinated Lamb Curry with Mustard, Yoghurt and Spices
Non-vegetarianOrigin Bengali

A slow-cooked Bengali lamb curry with yoghurt, mustard oil and a thick spiced gravy, plus potato chunks. It tastes rich, tangy and warmly spiced.

Marinade spices

0.8 gWhisked into the yoghurt and mustard oil for the lamb marinade (step 1)
01
0.8 g¼ teaspoon
spice
Whisk into the yoghurt mixture.

Whole spices for the oil

4.9 gAdded to the hot vegetable oil before the onion (step 4)
Keep whole; add them to the hot oil together.

Ground spices for the sauce

9 gStirred in after the lamb has browned (step 9)
Stir together in a small bowl.

Everything else

01
45 g3 tablespoons
dairy
02
14 g1 tablespoon
oil/fat
03
Leg of lamb · Mutton raanon the bone, cut into 4cm pieces (ask your butcher to do this)
800 g
meat
04
9 g3 cloves
aromatic
05
10 g2½ cm
aromatic
06
40 g3 tablespoons
oil/fat
07
Onion · Pyazfinely sliced
150 g1 onion
vegetable
08
16 g1 tablespoon
vegetable
09
Potato · Aloocut into chunks
300 g1 potato
vegetable
10
15 g1 tablespoon
souring agent
11
to taste
salt
12
1.5 g1 tablespoon
herb

Method

  1. In a bowl, whisk 45 g greek yoghurt, 13.5 g mustard oil, the marinade spices (0.8 g ground turmeric) and a pinch of salt.
  2. Add 800 g leg of lamb pieces and turn until coated. Cover and chill for 1 hour, or overnight.
  3. Blend 9 g garlic, 10 g fresh ginger and a little water to a smooth paste; set aside.
  4. Heat 40.5 g vegetable oil in a heavy pan over medium heat. Add the whole spices for the oil (0.7 g green cardamom pods, 0.4 g cloves, 1.2 g cassia bark, 3 g dried Kashmiri chillies) and let them sizzle for 1 minute.
  5. Add 150 g onion and fry over medium heat for 10 minutes, until soft and lightly coloured.
  6. Stir in the garlic and ginger paste and fry for 30 seconds.
  7. Add 15.6 g tomato purée and fry for 1 minute.
  8. Add the lamb with its marinade and cook over medium heat for 4–5 minutes, stirring, until the meat loses its raw colour.
  9. Stir in the ground spices for the sauce (3.6 g ground coriander, 2.6 g ground cumin, 2.5 g Kashmiri chilli powder) and fry for 6–8 minutes.
  10. Add 300 g potato chunks and salt to taste. Cover and simmer for 1 hour, until the lamb is tender and the gravy is thick; stir now and then and more often near the end so nothing catches.
  11. Stir in 15.3 g lemon juice and more salt if needed.
  12. Scatter over 1.5 g roughly chopped coriander leaves. Serve warm with puris.

Don't have something?

Greek yoghurt
Ground turmeric
  • Ground ginger

    Use 50% of the weight. Mimics turmeric's warm, earthy, rhizome background, but provides none of the golden-yellow colour.

  • Saffron

    Steep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.

Mustard oil
  • Peanut oil

    Use equal weight. It handles high-heat cooking well, but lacks the signature pungent, nasal heat of mustard oil.

  • Vegetable oil

    Use equal weight. Neutral in flavour, so your curry will lack the characteristic Bengali or North Indian pungent punch.

Leg of lamb
  • Leg of spring lamb

    Use the same weight; younger and tenderer, so reduce cooking by 10–15 minutes.

  • Lamb shoulder

    Use the same weight; more fat, so cook 15–20 minutes longer and skim excess fat.

  • Leg of goat

    Use the same weight; stronger flavour and tougher, so cook 15–20 minutes longer.

Garlic
  • Garlic paste

    Use equal weight. Fry gently in oil or ghee with the ginger; incorporates smoothly into curries without visible minced bits.

  • Garlic powder

    Use 15% to 20% of the weight (about 1 g for every 5 to 6 g fresh cloves). Whisk into sauces; gives a savoury, toasted garlic flavour without raw pungency.

  • Shallot

    Use 1.5 times the weight, very finely minced. Sauté until golden; provides savoury allium sweetness, though it lacks garlic's pungent sulphur bite.

Fresh ginger
  • Ginger paste

    Use equal weight. Sauté in hot fat until the raw allium smell disappears; slightly wetter, but provides identical warmth and pungency.

  • Ground ginger

    Use 20% to 25% of the weight (1 g for every 4 to 5 g fresh). Stir into the gravy; adds peppery heat and warmth, though it misses the crisp, zesty kick of raw root.

Vegetable oil
  • Peanut oil

    Use 1:1 by weight. Handles high-heat frying identically and introduces a very subtle, pleasant nuttiness.

  • Ghee

    Use 1:1 by weight. Yields a much richer, authentic aroma and a glossy, heavier mouthfeel.

  • Mustard oil

    Use 1:1 by weight. Heat until smoking, then cool slightly before cooking to temper its intensely pungent, sharp mustard kick.

Green cardamom pod
  • Green cardamom seed

    Use 35 to 40% of the total pod weight; lightly bruise the seeds before frying in oil to release their essential oils.

  • Ground green cardamom

    Use 20 to 25% of the pod weight (about 1 generous pinch per pod); stir in toward the end of cooking so the delicate floral notes do not dissipate.

  • White cardamom pod

    Use 1:1 by pod count or weight; crack gently before using, though it is slightly less intensely floral.

Clove
  • Ground cloves

    Use 1 g ground for 4 g whole (or 1 small pinch per 2 to 3 whole cloves). Add with spice powders; disperses intense warmth quickly, so use with restraint.

  • Allspice berries

    Use 100% of the weight whole in tempering. Imparts a warm, clove-like aromatic profile combined with hints of nutmeg and cinnamon.

  • Black cardamom pod

    Use 1 pod for 3 to 4 cloves in whole tempering. Shares a camphor-like warmth and medicinal depth, though it introduces a distinct smoky undertone.

Cassia bark
  • Ceylon cinnamon

    True cinnamon: thinner, papery quills, milder and sweeter. Use about 1.5 times the weight, and taste.

  • Ground cinnamon (cassia)

    Use about a third of the weight (0.5 g ground for a 2.5 cm piece), stirred in with the ground spices rather than fried whole, since the powder burns quickly.

  • Cassia buds

    Use 60-70% of the weight; stronger and more peppery, so taste before adding more.

Dried kashmiri chilli
  • Kashmiri chilli powder

    Use 1 g powder for every 1.5 g whole dried chilli; whisk with a spoonful of warm water and stir into the masala to provide identical ruby colour and mild heat.

  • Dried red chilli

    Use 35% to 40% of the weight; discard seeds before tearing into oil to temper. Delivers a much fiercer heat, with significantly less red colouring.

Onion
  • Shallot

    Use equal weight, finely sliced. Shallots soften and brown faster, giving a slightly sweeter and more delicate base to curries.

  • Cabbage

    Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.

Tomato purée
  • Tomato

    Use 200% to 250% of the weight. Finely grate or blend fresh tomatoes, then cook them down until the moisture evaporates and the oil separates.

Ground coriander
  • Coriander seeds

    Dry-roast lightly in a pan and grind to a fine powder; use equal weight (1:1). Offers a noticeably fresher, brighter citrus note.

  • Ground cumin

    Use 50% to 75% of the weight. Lacks the floral, citrusy profile of coriander and turns the gravy heavier, earthier, and darker.

  • Garam masala

    Use 50% of the weight and stir in near the end of cooking. Adds warmth and depth since it contains ground coriander, but introduces stronger spices like clove and cinnamon.

Ground cumin
  • Cumin seed

    Dry-roast briefly and grind finely; use equal weight (1:1). Imparts an even punchier, nuttier, toasty aroma than pre-ground cumin.

  • Ground coriander

    Use equal weight (1:1). Adds mild, lemony sweetness rather than cumin's smoky, earthy bite; curries will taste lighter and less savoury.

  • Black cumin seeds

    Grind finely; use 60% to 75% of the weight. Produces a darker, more complex, smoky-herbal flavour suited to rich gravies.

Kashmiri chilli powder or mild paprika
  • Kashmiri chilli powder

    Use the same weight; this is the first half of the book's option and gives the best red colour with mild heat.

  • Mild paprika

    Use the same weight; add a pinch of cayenne pepper for warmth. Slightly less colour.

  • Paprika

    Use the same weight and add cayenne pepper to taste; works but is less aromatic.

Potato
  • Eggplant

    Use equal weight. Cut into large chunks; cooks down much faster (10-12 minutes) and softens into the sauce rather than staying starchy and firm.

  • Paneer

    Use 80% of the weight. Cube and add in the last 5-10 minutes of cooking; adds rich dairy protein instead of starchy bulk.

  • Dried chickpea

    Use 45% dry weight. Soak overnight and boil until fully soft before stirring into the sauce to simmer for 10 minutes.

Lemon juice
  • Lime juice

    Use equal volume or weight; delivers almost identical sharp acidity with a faintly more aromatic, bitter-edged profile.

  • Dried mango powder

    Use 25% of the weight (about 1 g amchoor for 4 g juice); provides clean fruity tartness without thinning the sauce.

  • White vinegar

    Use 75% of the volume; gives direct sourness without any citrus floral fragrance.

Coriander leaves
  • Coriander (cilantro) or basil

    Use the same weight, choosing the coriander element if available. If only basil is available, expect a sweeter, more aniseed flavour.

  • Basil leaves

    Use the same weight. Basil is sweeter and more aromatic in a different way; add near the end so it keeps its perfume.

  • Coriander paste

    Use 1.5 times the weight and reduce other liquid slightly; it is less fresh and more concentrated, so taste before adding more.

Similar dishes

Nalli Gosht
Spiced Lamb Shanks
Nalli Gosht tastes rich and tangy with a gently aromatic rose-water and warm-spice finish, while this dish tastes more mustardy, warmly spiced and tangy with potato in the gravy.
  • Same: Nalli Gosht shares with this dish a slow-cooked lamb curry base of onion, tomato purée, greek yoghurt, garlic, ginger, cassia bark, green cardamom, clove and kashmiri chilli.
  • Different: Nalli Gosht uses lamb shanks instead of leg of lamb, adds butter, rose water, nutmeg, black peppercorn and green bird’s eye chilli, and lacks this dish’s mustard oil, potato, ground cumin and larger lemon juice quantity.
Laal Maas (Indian Kitchen)
Rajasthani Lamb Curry
Laal Maas tastes fiery and tangy from dried Kashmiri chilli, with yoghurt softening the heat, while this dish tastes rich, tangy and warmly spiced from mustard oil and yoghurt.
  • Same: Laal Maas shares lamb, Greek yoghurt, vegetable oil, onion, garlic, green cardamom, clove, Kashmiri chilli powder, ground coriander, ground cumin, lemon and coriander leaves with this dish.
  • Different: Laal Maas uses bone-in lamb, dried Kashmiri chilli, bay leaf and water, and it lacks this dish's mustard oil, tomato purée, potato, fresh ginger, turmeric and cassia bark.
Kheema Aloo Tikki
Spicy Lamb Potato Cakes
Kheema Aloo Tikki tastes crisp and savoury with a direct bird’s-eye chilli kick, whereas this dish tastes rich, tangy and warmly spiced from yoghurt, mustard oil and a thick gravy.
  • Same: Kheema Aloo Tikki shares leg of lamb, potato, onion, garlic, ginger, tomato purée, ground coriander, Kashmiri chilli and green cardamom with this dish.
  • Different: It uses malt vinegar as the souring agent, adds green peas and a potato-crust coating of flour, egg and breadcrumb, and is shallow-fried, while this dish uses yoghurt and lemon juice, mustard oil and a slow-cooked gravy.
Aloo ka Salan
Lamb with Potatoes in Yoghurt Sauce
Aloo ka Salan tastes richer and more yoghurt-heavy from the ghee and larger yoghurt amount, with a gentle tang, while this dish is sharper and more tangy from lemon juice, tomato purée and mustard oil.
  • Same: Aloo ka Salan and this dish are both lamb curries with potato chunks, yoghurt, onion, garlic, ginger, ground coriander, turmeric and salt in a slow-simmered spiced gravy.
  • Different: Aloo ka Salan uses ghee instead of mustard oil and vegetable oil, has much more yoghurt and potato, lacks tomato purée, whole cardamom, clove, cassia, dried Kashmiri chilli, lemon juice and fresh coriander, and adds garam masala.