October, and the market stalls in Copenhagen are stacked with pumpkins. Not the carved kind. The cooking kind: dense hokkaido with their thin orange skin, heavy muskat pumpkins the color of wet sand. This is the week you make syltede graeskar.

Every Danish family that preserves has a version of this. It's a mormor recipe, the kind your grandmother made by feel and your mother learned by watching. Pumpkin cubes sit overnight in salt, which draws out the water and firms the flesh so it can survive the syrup without falling apart. The next morning you simmer them gently in a sweet, sharp bath of vinegar and sugar spiked with whole cloves, cinnamon sticks, and coins of fresh ginger. The cubes turn translucent and jewel-like, holding the warmth of the spices in every bite. It's autumn in a jar. You open it in December and the kitchen smells like October again.

Two things matter most. First: don't skip the overnight salting. That patience is what separates pumpkin preserve from pumpkin compote. Salted pumpkin holds its shape. Unsalted pumpkin collapses. Second: keep the simmer gentle. A rolling boil will shatter the cubes. You want the syrup barely trembling, and you'll know when it's right because the pieces will look like amber glass, firm at the edges, yielding at the centre. This is the joy of waiting, made edible.