Tarteletter med Asparges og Skinke

White asparagus arrives in Denmark at the end of April, sometimes the first week of May, and the moment it appears on the market stalls the Danish kitchen reorients itself. The pale spears sit in neat bundles, tied with raffia, waxy and almost translucent. They have a short window. Six weeks at most. This is the joy of waiting, and tarteletter med asparges is what you make when the waiting is over.

There are two great Danish tarteletter. The first is hons i asparges, chicken and asparagus, the everyday classic that Danish children grow up eating at birthday parties and family lunches. The second is this one, the Easter variant, where the chicken is replaced by good cooked ham and the dish takes its place on the long table at the paaskefrokost, the Easter lunch that anchors the Danish spring. Both versions share the same architecture: a crisp puff pastry shell, a creamy sauce built from asparagus stock, and the tender white spears folded through. The ham gives this version its salt, its weight, its place at the holiday table.

What I want you to understand before you begin is that this dish is built on one ingredient: the asparagus. Everything else serves it. The peels go into the cooking water and become your stock. The stock becomes your sauce. The tips garnish the top. Nothing is wasted, and every part of the spear earns its place. If you can find Danish white asparagus in season, use it. If you cannot, use the best European white asparagus you can buy, and make this in late April or May when the season is true. White asparagus from a tin will not give you this dish. It will give you something else, something sad. The season decides.

Pay attention to two moments. The first is when you build the sauce: add the warm liquid slowly, whisk steadily, and the sauce stays smooth. The second is when you fill the shells: the shells must be warm and the sauce must be hot, and they meet at the very last second. Get those two right and you'll know when it's right.