There's a moment in early July when the cucumbers at the market suddenly taste like something. Not the year-round hothouse version that's mostly water and crunch, but real summer cucumbers, pale green and cool and faintly grassy. This is when agurkesalat belongs on the table.

Agurkesalat is the side that makes half the Danish summer repertoire work. Stegt flaesk, the crackling pork belly that's been voted the national dish, would be unbearably rich without it. Frikadeller need its sharpness to cut through the butter. Anything off the grill, sausages, chicken, a piece of fish, finds its balance next to a spoonful of these cool, tangy slices. It's not trying to be the star. It's trying to make the star shine, and it does that better than almost anything else in the Danish kitchen.

The method is simple, but every step has a reason, and I'll walk you through each one. You salt the cucumbers first to pull out their water, because unsalted cucumbers turn the brine pale within an hour. You warm the vinegar to dissolve the sugar, but you don't boil it hard, because hard boiling drives off the sharpness. You let the whole thing rest so the flavors settle into each other. Do these three things and you'll make an agurkesalat that tastes the way it's supposed to taste: bright, sweet-sour, dill-scented, the kind of side dish that makes a picnic feel chosen. Tak for mad.