Peel the asparagus and cut off the woody ends. Bring 2 litres of water with 1 tablespoon of salt, 1 tablespoon of lemon juice and 2 tablespoons of sugar to the boil, boil the asparagus in it for about 15 minutes. Meanwhile melt 250 g butter, remove from the heat and let it cool down.
Whisk egg yolks and 2 tsp. lemon juice on a warm water bath until thick and creamy. Gradually fold in the butter. Season with salt, pepper and 1 pinch of sugar. Arrange the asparagus and sprinkle with hollandaise sauce.