December in Denmark is the month of the roast. Flæskesteg at Christmas, oksesteg on the Sundays leading up to it, cold cuts on rugbrod at julefrokost when the table is crowded and someone is always reaching across for another piece. And next to the meat, always, a bowl of peberrodssauce.

This is not a complicated recipe. It's fresh horseradish, grated fine, folded into cold whipped cream with vinegar and a little sugar. Five minutes of work, six ingredients, and a result that transforms a good roast into the right meal. The cream carries the horseradish's heat without smothering it. The vinegar keeps everything bright. The whole thing should taste clean and sharp and cold, the way a winter condiment should.

Two things matter here, and I'll tell you both now so you can stop worrying about the rest. First: grate the horseradish as fine as you can, and do it just before you use it. The heat lives in the volatile oils, and they start dying the moment the root is cut. Second: fold, don't stir. Stirring kills the air in the cream, and the air is what makes this sauce feel light and alive instead of thick and flat. Get those two things right and the rest follows. This is one of those recipes where confidence comes from understanding what the ingredients are doing, and once you understand it, you'll make it without thinking.