Omelet à la Nantua

Omelet à la Nantua (a soft French omelet filled with crayfish in its coral-red sauce) teaches one uncompromising lesson: the filling must be ready before the eggs touch butter. A baveuse omelet, soft and barely set at the center, won't wait while you cut tails or search for a warm sauce spoon.

The original entry assumes a saucier beside the range, a stockpot never off the fire, and a salamander at the pass. At home, reach for prepared Nantua sauce, warm the plates gently, and cook four individual three-egg omelets one after another. Rebuilding the sauce during egg cookery and maintaining fierce holding heat are brigade scaffolding and can go. The book's proportions stay: six small tails per omelet, each cut into three and lightly bound with sauce, then two fine whole tails touching thick-end to thick-end on top and a thread of sauce around the rim.

That restraint matters. Too much sauce smothers the eggs, while cold filling arrests their tender set. Have every tail portioned and the sauce warm before the butter enters the pan. That is the step that decides the dish.