Potage Marigny

Potage Marigny (Fontange pea soup with peas and green-bean lozenges) teaches a fine classical distinction: the foundation may be silken, but the garnish gives the spoon its character. The soup is already Fontange. One measured tablespoon each of whole peas and fine green beans, cut into lozenges, makes it Marigny. Keep those vegetables green and gently firm, or the distinction disappears into the purée.

The source entry assumes Potage Fontange is already complete, a saucier is holding it gently, and a separate garnish pan stands ready beside a stockpot that rarely leaves the fire. Your honest equivalent is one small saucepan used twice, first for blanching and then for warming. No salamander belongs here. Separate holding pans are brigade scaffolding and can go; the finished Fontange foundation and last-minute garnish are the dish and must stay. I have scaled the service to about two quarts while preserving the source garnish exactly: one tablespoon of peas and one tablespoon of beans.

This is not the moment to invent cream, herbs, or another thickener. Let Potage Fontange arrive as its own finished preparation, then protect its texture with gentle heat. The step that matters most is the final warming: add the garnish only when the soup is ready to serve, and never let the pot boil afterward.