The base for the sauce can be prepared two days ahead; the pan juices from the [Roasted Double Rack of Pork](/recipes/food/views/233397) are added to it before serving.
by Bruce Aidells, Nancy Oakes·published 2006-10-26
Pour all pan juices from roasting pan into small bowl. Spoon off fat from top; pour juices into mushroom base in saucepan. Place roasting pan over 2 burners set at medium heat. Pour in Sherry. Boil 1 minute, scraping up browned bits; pour into mushroom base. Boil sauce until reduced to 3 cups, about 8 minutes; season with salt and pepper. Transfer to bowl. Serve with pork.