Peel 3 oranges so that the white skin is completely removed. Halve the oranges and cut into pieces. Squeeze 1 orange. Clean, wash and chop the spring onions.
Peel garlic and dice finely. Wash parsley and coriander, shake dry, pluck off leaves and chop coarsely. Put herbs and garlic on a plate and mix. Wash the lamb salmon and dab dry.
Heat 2 tablespoons of oil in an ovenproof pan and fry the lamb salmon for 3-4 minutes, turning them over. Season with salt and pepper and turn in the herb mixture. Return to the pan and continue cooking in the preheated oven (electric range: 150 °C/ convection oven: 125 °C/ gas: level 1) for approx. 8 minutes.
In the meantime, boil 1/4 litre of water, 1 teaspoon of salt and 1 tablespoon of oil in a large pot. Roast the almonds in a pan without fat and take them out. Put butter and spring onions into the hot pan, fry for about 2 minutes while turning.
Remove the pot of boiling water from the heat, stir in the couscous and leave to swell for 2 minutes. Add spring onions to the couscous, let it swell for 2-3 minutes at low heat. Loosen with a fork and fold in orange pieces.
Take the lamb salmon out of the oven, wrap in aluminium foil and let it rest for about 3 minutes. Add orange juice and stock to the roast, stir in tomato paste and simmer for 1-2 minutes. Season with pepper.
Cut lamb salmon into slices and arrange on plates with orange coucous. Pour the roast stock over the meat and sprinkle with almonds. Serve with creamy full-milk yoghurt.