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Lamb Kidneys Au Beurre
Split in two twelve very fresh lamb kidneys, remove all the skin and place them on a plate. Season with a teaspoon salt and half teaspoon white pepper; repeatedly roll in the seasoning. Heat a tablespoon butter in a frying pan, place in the kidneys and briskly cook for three minutes on each side; squeeze in the juice of quarter of a sound lemon, mix a little and serve.
A three-ingredient sauté that depends entirely on freshness and heat. Everything that can go wrong here goes wrong in the pan.
- Trim the core, not just the skinThe recipe says to remove the skin (the thin membrane surrounding each kidney), but you also need to cut out the white fatty core and any tubes at the hinge once the kidney is split. Left in, it stays chewy and carries the strongest smell.
- Freshness is the whole dish"Very fresh" is doing real work. Lamb kidneys develop an ammoniac edge within a day or two; buy them the day you cook them, and reject any that smell sharp rather than faintly metallic. A brief soak in cold water or milk and a thorough pat dry helps, though it is not in the original.
- Three minutes a side is on the long sideFor split lamb kidneys in a hot pan, 90 seconds to two minutes per side is usually enough. They should stay rosy at the centre; cooked through to grey they turn firm and grainy.
- More butter than a tablespoonOne tablespoon for twenty-four kidney halves will scorch before the last piece is in. Use two to three tablespoons in a wide, very hot pan, and cook in two batches so the kidneys sear rather than steam in their own liquid.
- Dry them before seasoningThe instruction to roll them repeatedly in salt and pepper draws moisture to the surface. Season, then blot just before they hit the butter, or you will get no browning at all.
- "Sound lemon"Period phrasing for unblemished and not shrivelled. The juice of a quarter lemon is only two teaspoons or so; add it off the heat so it lifts the pan juices without boiling away.
- YieldTwelve kidneys serves four generously as a main with toast or rice, or six as a first course. In the book's own era this would have gone out as a breakfast or luncheon dish.
"Au beurre" simply means cooked in butter, and the plainness is the point: this is the French professional kitchen's baseline treatment of kidneys, against which every sauced version (au vin blanc, sauce Madère, turbigo) is a variation. Alexander Filippini, long associated with Delmonico's in New York, compiled The International Cook Book in the first decade of the twentieth century for readers who expected offal on the table as a matter of course; devilled and sautéed kidneys are best attested as a British breakfast dish, a standard of the London table through the Edwardian period. The lemon at the end is the classic corrective for organ meats, cutting the iron-rich richness without introducing a sauce, and it survives in essentially this form in French bistro cooking today.