Oysters Au Champagne

This is white-tablecloth French cookery, a poached oyster preparation that shows up on old Michelin-star menus from Brittany to Alsace. The champagne does double duty: its acid delicately cooks the oysters without toughening them, and its bubbles infuse the poaching liquid with a subtle floral note that makes the finished sauce taste expensive.

Don’t waste the bubbles on this. A dry blanc de blancs, a crisp crémant, or even a cava works beautifully. Save the vintage Dom for drinking.

Poach the oysters until just their edges curl, about a minute in barely simmering liquid. Overcooking ruins oysters faster than any other shellfish, turning them rubbery and chalky in seconds.

The roux sauce comes together from the strained poaching liquid. Whisk 5 tablespoons of blonde roux into the hot champagne-oyster broth, simmer to thicken, then taste and adjust. The spinach bed underneath adds color, earthiness, and a textural counterpoint to the silky oyster and sauce.

Chef Tips

• Reserve oyster liquor as you shuck, never discard it. Its briny depth is the backbone of the sauce.
• Wilt spinach quickly in a dry pan, not butter, or the finished plate gets too rich.
• Strain the poaching liquid through a fine sieve or cheesecloth to catch any shell shards.
• Serve on warm plates, the sauce congeals fast on cold china.

Variations

• Finish the sauce with a tablespoon of crème fraîche for extra richness.
• Swap spinach for watercress or baby kale for a peppery bite.
• Add a pinch of saffron to the poaching liquid for a Provençal twist and golden color.