Bring 1/2 litre water, 1 teaspoon salt and saffron to the boil. Add rice and cook without lid for 5-10 minutes until all the liquid is absorbed by the rice. Place rice on a sieve. Peel garlic and ginger.
Chop the ginger finely, press the garlic through a garlic press. Wash the meat, dab dry and cut into cubes of about 3 cm. Heat oil in a pan. Brown the meat while turning. Add ginger, garlic, 1 teaspoon cumin and cardamom, fry briefly and season with salt, chilli and nutmeg.
Add cinnamon stick and cloves and deglaze with chicken soup. Mix 50 g yoghurt and canned milk and pour in while stirring. Cover and cook over low heat for about 15 minutes. Meanwhile cut cashew nuts and pistachios in half.
Heat 1 tablespoon of fat in a pan, fry cashew nuts, pistachios, almonds and raisins until golden brown, remove and allow to cool. Put half of the saffron rice in an ovenproof dish.
Spread the meat with the braising stock on top and cover with the remaining rice. Close the mould tightly with a lid and braise in the preheated oven (electric range: 200 °C / gas: level 3) for approx. 20 minutes.
Meanwhile, for the yoghurt drink (Lassi) yoghurt, stir the remaining cumin and salt until smooth. Gradually, stirring constantly, add 1/2 litre ice water and mix well. Keep cool until serving.
Clean and wash spring onions and cut into fine rings. Heat the remaining fat in a pan and sauté the spring onions for 1-2 minutes. Arrange the finished Biriani on a large plate.
Pour spring onions over the rice, sprinkle nuts and raisins all around the edge. Serve with the chilled yoghurt drink.