Lent Chaud-Froid Sauce

Sauce chaud-froid maigre (Lenten cold-glazing sauce) teaches one true thing: temperature, not thickness alone, decides the finish. Used too warm, the sauce runs from cold fish; allowed to set in the pan, it lands in ridges. At the proper glazing point it flows in an even ivory sheet, then settles into a smooth, delicate coat.

The original preparation assumed a saucier on staff, fish velouté and white fish jelly ready in quantity, a tamis for straining, and a crushed-ice station for cooling. Your honest equivalents are finished fish velouté and white fish jelly, one broad saucepan, a fine sieve, and a bowl of ice water. The brigade quantity becomes about two quarts, enough depth for glazing a generous dinner-party platter, while the reductions and proportions remain intact. One cook, one stove, one evening.

The dedicated ice station and tamis were brigade scaffolding, so they can go. Reducing the velouté, enriching it with real cream, adding the fish jelly, and stirring as it cools are the dish and must stay. Give your full attention to that final cooling: stop when the sauce coats a cold spoon smoothly but still flows.