Chocolate Bread Pudding with Cookie Citrus Rind

The only old-fashioned part of this bread pudding is the taste, which, although lighter and less sweet than more traditional renditions of bread pudding, has a wonderfully rich chocolate flavor that is amplified by the bitter chocolate. Instead of the familiar method whereby sliced bread is soaked in a custard mixture in its baking dish to make multiple servings, here the bread is cut into small cubes and, after absorbing the custard, is divided among individual cake rings. If the rings are