Trim, and cut the kidney into slices; season them with salt and pepper, and dredge them well with flour; fry them on both sides, and when they are done through, lift them out, empty the pan, and make a gravy for them with a small slice of butter, a dessertspoonful of flour pepper and salt, and a cup of boiling water; shake these round and give them a minute's simmering: add a little mushroom catsup, lemon-juice, eschalot vinegar, or any store sauce that will give a good flavour. Minced herbs are to many tastes an improvement to this dish, to which a small quantity of onion shred fine can be added when it is liked.

6 to 9 minutes.