Parboil a pair of sweetbreads, and gash. Decorate in gashes with truffles cut in thin slices, and slice in fancy shapes. Melt three tablespoons butter, add two slices onion, six slices carrot, and sweetbreads; fry five minutes. Pour off butter, and add one-fourth cup brown stock and two tablespoons Sherry wine. Cook in oven twenty-five minutes, basting often until well glazed. Serve in nests of peas, and pour around Mushroom Sauce.
Nests. Drain and rinse one can peas, and rub through a sieve. Add three tablespoons butter, and salt and pepper to taste. Heat to boiling-point, and shape in nests, using pastry bag and tube.
Mushroom Sauce. Clean three large mushroom caps, cut in halves crosswise, then in slices. Sauté in two tablespoons butter five minutes. Dredge with one tablespoon flour, and add one cup cream and liquor left in pan in which sweetbreads were cooked. Cook two minutes.