Stuffed Mushrooms

One of the nicest things one can do to a cultivated mushroom. Relatively small (about 3-inch diameter), firm, healthy cèpes are glorious prepared in this way; their heady and exhilarating flavor will not be improved by even the slightest addition of nutmeg to the duxelles. In either case, the flavor will be much the best if the mushrooms are cooked over a bed of hot coals, but the presentati