Frozen Hazelnut Parfaits Filled with Hot Fudge Sauce

India has the delightful custom of serving a bite or two of dessert when the savory meal is presented, teasing your taste buds with a preview of coming attractions. You can do the same. When you hollow out the center of the parfaits to make room for the hot chocolate sauce, place the scraps in small cups or bowls to serve with your main course.