Warm 39.6 g ghee in a heavy pot over medium heat. Tip in the whole spices for the ghee and fry for about 1 minute until crackling, then add 60 g thinly sliced onion and cook for 5 to 7 minutes until deep golden brown.
Add 1000 g lamb cut into pieces, season with salt to taste, and stir in the first ground spices. Fry for 5 minutes, adding a splash of water if the mixture catches on the bottom.
Add the chilli and ginger paste and fry for an additional 2 to 3 minutes.
Pour in 500 ml water. Bring to a gentle simmer, cover, and cook for 1 to 1½ hours until the meat is completely tender.
Whisk 1 teaspoon flour into 1014 g whisked plain yogurt. Stir the yoghurt mixture and 1 g chopped coriander leaf into the pan, then simmer uncovered for 30 minutes until the sauce has thickened and the oil separates on top.
Use 120% of the weight; melt gently over low heat to avoid burning the milk solids, which will yield a softer, creamier richness rather than a nutty aroma.
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.
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.
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.
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.