Dab fillet of beef dry, wrap in cling film and freeze in the freezer for about 20 minutes, then it is easier to cut into thin slices.
Meanwhile, peel and chop the garlic for the vinaigrette. Mix with vinegar, mustard, salt, pepper and sugar. Fold in 5 tablespoons of oil bit by bit. Clean, wash and shake dry the arugula. Chop the parmesan into shavings.
Spread a thin layer of oil on 4 plates.
Wrap the frozen fillet out of the foil. Cut into thin slices (approx. 2 mm) with a slicing machine or a sharp knife. Arrange slightly overlapping on the oiled plates.
Scarf with the kitchen gas burner until the surface is slightly cooked.
Mix the rocket salad with half of the vinaigrette. Drizzle meat with the rest of the vinaigrette. Add some rocket salad to each. Sprinkle with parmesan.