Peel oranges and grapefruits so that the white skin is completely removed. Cut out the fillets between the parting skins, collecting the juice
Chop nuts. Mix 4 tbsp. citrus juice, vinegar, salt, pepper and sugar. Whip the oil into the mixture. Sort, clean and wash the lamb's lettuce. Clean and wash the chicory. Remove the leaves and chop a little smaller.
Wash the meat, pat dry and cut into strips. Fry in hot clarified butter for 3-4 minutes, turning frequently. Season with salt and pepper, remove
Carefully mix the prepared salad ingredients and sprinkle with the marinade. Sprinkle with walnuts. Garnish with a slice of orange if desired