Separate eggs for the scratching. Refrigerate the egg white. Mix flour, 125 ml milk and egg yolks until smooth. Season well with salt, pepper and nutmeg. Leave to swell for about 30 minutes. Wash and peel the asparagus, cut off the woody ends.
Peel and finely chop the onion. Wash the chervil, shake dry, put some leaves aside for garnishing. Finely chop the rest of the chervil. Mix sour cream, mayonnaise, 100 ml milk, onion and chervil.
Season with salt, pepper and 1 pinch of sugar. Put ##Asparagus## in boiling salted water with 1 level teaspoon of sugar, bring to the boil and cook for 12-14 minutes. In the meantime, beat egg whites until stiff and fold into the dough in portions.
Heat ##butter##lard in a pan (bottom 22 cm Ø). Add the dough and fry over medium heat until golden brown and cut into quarters. Turn each quarter and pluck into pieces. Fry for another 2 minutes.
Carefully lift the asparagus out of the water and let it drip off a little. Arrange asparagus, ham, scrape and sauce garnished with chervil. Add the rest of the sauce separately.