Cold Eggs, Frou-frou

Œufs froids Frou-frou (cold eggs dressed in yolk-rich chaud-froid) teaches the discipline of temperature. Chaud-froid is a sauce applied warm and served cold, and the one true thing to know before touching a pan is this: the eggs must be cold and absolutely dry, while the sauce and aspic must be cool enough to cling but still fluid. Decoration cannot rescue a coating that slides away.

The original assumed a saucier, a pale stock never off the fire, clear jelly ready in the garde-manger, equal little eggs chosen from a brigade-sized supply, and an ice bed for setting them. The home equivalent is a well-skimmed chicken stock reinforced with measured gelatin, a refrigerator, and a wire rack over a tray. Only the scale and equipment change: eight small eggs and one vegetable mould serve four. Clarifying a stockpot and tending an ice bed are brigade scaffolding; the one-third measure of sieved yolk, the black truffle, the clear glaze, and the moulded salad are the dish and must stay.

Frou-frou should arrive cool and gleaming, its ivory-gold eggs marked by black truffle rings and gathered around a bright green centre. It looks elaborate because the work is layered, not because any single task is beyond you. One cook, one stove, one evening, with the refrigerator doing the waiting. The decisive step is judging the chaud-froid on a chilled spoon before it touches the first egg.