Purée de Céleri-rave

Purée de Céleri-rave (celeriac purée soup) teaches the quiet discipline of dépouiller, purifying a soup by slow simmering and skimming until its flavour turns clean. It reaches creaminess without cream: celeriac supplies its earthy sweetness, potato gives body, and butter rounds the edges. The one true thing to know before touching the pan is that the full half-hour of skimming is not a flourish. It is the dish.

The original recipe assumed a saucier watching the pot, white consommé never off the fire, and a tammy ready for passing the purée. Your honest equivalents are a good prepared white consommé, a heavy saucepan, a food mill, and a sturdy fine-mesh sieve. Brigade watchfulness and multiplied service quantities are scaffolding; the blanching, gentle butter stew, potato binding, sieving, and thirty-minute dépouiller must stay. This compact one-pound batch already suits a home pot and makes close to two quarts, so its proportions remain intact. One cook, one stove, one evening.

Keep the celeriac pale in the butter, then hold the finished purée at the barest tremble while you skim. Colour makes it muddy, and haste leaves its flavour blunt. Give it the promised half-hour and it arrives ivory-smooth, clean, sweet, and ready for its crisp bread dice.