A traditional French treatment. In Britain, the sauce is likely to be finished with dashes of Worcestershire sauce and a pinch of cayenne.
Prepare as above:
Cut veal kidneys crosswise into ½-inch slices or lamb kidneys lengthwise in half. Season with:
Heat in a large heavy skillet over medium-high heat:
When the oil smokes, add the kidneys in batches and brown well, about 1 ½ minutes on each side. Transfer to a plate and keep warm, reduce the heat to medium, and pour off any fat. Add to the skillet:
Cook, stirring until softened, 3 to 4 minutes. Add:
Bring to a boil, scraping up the browned bits on the bottom of the skillet, and reduce to about ⅓ cup. Remove from the heat and discard the bay leaf. Stir in and mix thoroughly:
Season to taste with:
Return the kidneys and their juices to the skillet and stir gently to coat with the sauce. Top with: