Peel, wash and chop the carrots. Clean, wash and cut leek into rings. Also clean, wash and cut the celery into pieces. Cook prepared ingredients in boiling broth for about 7 minutes. Then drain and mix with 200 ml of the broth. Clean and wash iceberg lettuce, cut into bite-sized pieces and fold into the vegetables.
For the sauce, whip cream until semi-stiff and mix with crème fraîche and horseradish. Season to taste with salt, pepper and lemon juice. Roll up roast beef slices and fold into the salad. Serve with the sauce. Serve garnished with celery green as desired