Horse-radish Sauce

Sauce au raifort (horse-radish sauce) teaches a cold sauce's hardest lesson: chill is an ingredient. Fresh root supplies the fire, mustard and vinegar fix its edge, cream rounds it, and milk-soaked crumb binds it without cooking. The one true thing to know before you touch the grater is this: have the mustard-vinegar base ready, because the root's bite starts fading as soon as it is rasped.

The old formula assumed a saucier with a large basin, extra hands to rasp a pound of root, and a cold larder. It needed neither a stockpot nor a salamander. For the home kitchen, the brigade batch is reduced to three quarters, preserving every measured ratio while producing a generous two-quart holiday bowl; a food processor with a fine grating disc replaces the long hand-rasping. That labor is scaffolding. The milk-soaked, firmly pressed crumb and very cold service are the dish, and neither goes.

Make the acid base first, grate the root last, and fold without puréeing. That is the step that matters most, and it delivers a sauce cold, creamy, coarse, and properly awake. One cook, one stove, one evening.