Peel the asparagus generously and cook it in lightly salted water to which a pinch of sugar, a piece of hard bread and a little milk have been added.
Meanwhile, hard-boil the eggs. Then loosen the yolks and strain them through a sieve into a bowl, then season with mustard, lemon juice, oil and vinegar. Roughly chop the egg white and finely chop the herbs, also add to the bowl.
Arrange asparagus on preheated plates and serve. Serve the sauce separately.