If baking the biryani, set the oven to 150°C / 300°F. Place the saffron in a small cup, pour over 4 teaspoons of warm water, and set aside to infuse.
Melt 250 g ghee in a wide, heavy-bottomed pan over medium heat. Fry 2 tablespoon garlic paste (Pisi Lehsun) for about 1 minute until it turns pale gold. Add 2 tablespoon ginger paste (Pisi Adrak), the crushed seeds from 6 cardamoms, and the aromatic spices, cooking for 1 to 2 minutes until fragrant.
Add 1000 g lamb and cook for 10 to 15 minutes, stirring occasionally, until the meat is lightly browned. Stir in 101 g plain yogurt, salt to taste, and 1.5 litres of water. Simmer gently over medium heat for approximately 1 hour until the meat is tender, adding water if it dries out too quickly, finishing with roughly 250 ml of cooking liquid remaining in the pot.
While the meat simmers, cook 1000 g basmati rice in a separate pot of boiling water for roughly 10 minutes until partially cooked. Stir in the turmeric for the rice to colour the grains evenly, then drain thoroughly.
Spread the drained rice over the braised lamb in an even layer. Drizzle the steeped saffron liquid across the surface.
Place a tight-fitting lid on the pan and seal the rim with 150 g dough (or aluminium foil). Cook over the lowest possible stove burner with hot charcoal resting on the lid, or transfer the pan to the oven at 150°C / 300°F for 45 minutes. Gently fold the rice and meat together before dishing up.
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 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.
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.