Clean, wash and pluck the salad into bite-sized pieces. Wash the sprouts and let them drip off. Cut the trout filet into pieces. Arrange salad, sprouts and trout filets on plates.
Mix vinegar with salt, pepper and sugar. Whip the oil into it. Stir in trout caviar. Spread the marinade over the salad. Baguette tastes good with it.