A fragrant, slow-simmered lamb curry featuring tender meat enveloped in a rich onion and tomato gravy, balanced by the crisp bite of fresh water chestnuts.
Place 500 g lamb in a bowl, add the marinade spices and salt to taste, and mix thoroughly until the meat is evenly coated.
Heat 125 g ghee or vegetable oil in a heavy-based pan set over medium heat, then fry 300 g onion for 5–7 minutes until golden brown.
Add the ground turmeric, stir briefly, then tip in the marinated lamb and fry for roughly 5 minutes until well browned.
Pour in 750 ml water, then add 24–36 g green chilli and 2 g curry leaf. Turn the heat down to low, cover, and simmer gently for 1 to 1½ hours until the lamb is fully tender, topping up with water if the sauce reduces too much.
Stir in 120 g water chestnuts and 360 g tomato, frying for 1–2 minutes. Add 200 g coriander leaf along with 180 ml water, then cook over medium-high heat for 5 minutes until the water chestnuts have softened slightly.
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.
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.
Use 40% to 50% of the fresh tomato weight mixed with a splash of water. Imparts a deeper red colour, thicker sauce, and slightly sweeter cooked flavour.