Fish Royale

Royale de poisson (fish royale) teaches the quiet discipline of liaison, binding with yolks so gently that a clear soup receives a custard as smooth as satin. The one true thing to know before touching a pan is this: heat may set the royale, but it must never bully it. Brown the sole or boil the bain-marie and the texture coarsens.

The original formula assumed a saucier with cold Béchamel ready, a fish consommé never off the fire, a cloth tammy, and shelves of moulds. At home, a mini processor replaces the pounding mortar, a fine sieve replaces the tammy, and one shallow pan replaces the brigade's moulds. A salamander would brown what must remain pale, so it has no place here. What changed is the equipment and service scale; what stayed is the book's proportion of four ounces sole, two tablespoons Béchamel, one-quarter pint cream, and five yolks, added in that exact order. One cook, one stove, one evening.

The finished royale should be ivory and tender enough to yield under the spoon, yet firm enough to cut cleanly in the brilliant consommé. Cooling the fish is essential, and passing the paste through the sieve is the dish rather than brigade scaffolding. Above all, guard the bain-marie: it should barely quiver from beginning to end.