Wash and peel the asparagus and cut into pieces. Cook in boiling salted water with 1 pinch of sugar for about 8 minutes. Wash, clean and halve the strawberries. Clean, wash and drain the rocket. Peel and finely dice the shallot. Mix vinegar and 2 tablespoons of water, season with salt, pepper and 1 pinch of sugar.
Fold in the oil. Fold in diced shallots. Remove the asparagus and let it cool down a little. Arrange strawberries, asparagus and rocket on a plate. Pour vinaigrette over it. Sprinkle with parmesan slices