Purée de Crosnes

Purée de crosnes (Chinese artichoke purée) teaches the discipline behind every fine vegetable purée: water must leave before richness can enter. Crosnes hold more moisture than their pearly little tubers suggest, and one part potato to four parts crosnes gives body without stealing their sweet, nutty character. The one true thing to know before touching the pan is this: drying the sieved purée is not a tidying step. It is the dish.

This entry needs neither a stockpot nor a salamander, but it did assume a brigade cook free to press a large hot batch through a tamis (drum sieve), dry it over a fierce range, and send it out at once in a timbale. At home, 600 grams of crosnes with 150 grams of potato preserves the exact ratio; a sturdy fine-mesh sieve replaces the tamis, medium-high heat under a broad saucepan supplies fierce evaporation without scorching the smaller batch, and a warm serving bowl replaces the formal timbale. The extra hand and formal vessel are scaffolding. The hot sieve and decisive drying stay. One cook, one stove, one evening.

When it is right, the purée sits in a pale, supple mound with a satin butter sheen, neither runny nor stiff. Press the vegetables through the sieve while they are hot, then dry the purée until a spoon stroke exposes the pan cleanly before adding a drop of milk. That is the step that matters most.