An orange cake typically uses the juice and sometimes the pulp of an orange, but what makes this clementine cake unique is that it uses the entire fruit, including peel, pith and pulp. You might think that would make the cake bitter, but not only does it not do that, the whole fruit infuses the entire cake with a divine citrus flavor. It's a great idea; kudos to the Sephardic Jews who were the first to create this exquisite cake.