Dyrlaegens Natmad

Copenhagen in late November. The afternoon light fails by three, and the old lunch restaurants along the inner canals fill up with people who need a proper meal before the dark closes in. Dyrlaegens natmad belongs to this hour. It's the piece of smorrebrod you order when you want something that will stay with you until dinner, and maybe past it.

The name translates as the veterinarian's midnight snack, and there is a real vet behind it. He walked into Oskar Davidsen's smorrebrodsrestaurant in the 1880s after a long day of rounds, hungry and cold, and asked for something substantial. What the kitchen made him became one of the most recognizable pieces of smorrebrod ever invented and a fixture of the Danish lunch table.

The whole dish is architecture. A thick slice of rugbrod spread with cold butter. A generous layer of leverpostej, the coarse liver pate that every Danish household keeps in the fridge. Cold salt beef, sliced thin. Diced aspic, the trembling jelly made from beef stock. Onion rings. Cress. Five layers, each doing its job, and the whole thing eaten with a knife and fork because lifting it would collapse everything.

I'll walk you through it step by step, and I'll tell you why each layer matters so you're never guessing. The only thing you have to plan ahead is the aspic, which needs a couple of hours in the fridge to set. Start with that and the rest will come together quickly. You'll know when it's right, because the moment you cut through all five layers and they hold together on your fork, you've made it properly.