Cover and freeze the fillet of beef for 4-5 hours in the freezer. Clean, wash and thinly slice the mushrooms. Clean, wash and pat dry the rocket. Coarsely chop nuts. Mix vinegar, salt, pepper and sugar.
Beat olive oil into it and add nuts to the vinaigrette. Cut frozen fillet of beef into wafer-thin slices. Arrange the rocket, fillet of beef and mushroom slices on four plates, pour the vinaigrette over them and let it steep a little. Serve sprinkled with coloured pepper
Cutlery: Christofle