Just as you're ready to serve, add sherry. Serve in covered dish and have it very hot. Bring to boil and cook 30 to 40 minutes until rice is just starting to split, but still crunchy. Drain and put aside. Boil white rice in large pan of lightly salted boiling water over medium heat for 10 to 15 minutes, then drain.
Brown pine nuts lightly in cup butter.
Use small saute pan and watch closely so as not to burn nuts. Heat 1 cup butter in heavy Dutch oven-type pan. Saute leeks, shallots and mushrooms in butter. Season with salt, pepper and cayenne pepper to taste. Add freshly grated nutmeg.