Charlotte cakes always fancy up any holiday table, no matter the variation. For this citrusy charmer, soak ladyfinger biscuits in fresh orange juice and layer them on the bottom of a Charlotte baking tin. Then continue to arrange them vertically around the sides. Prepare whipped cream with 1 1/3 cup heavy cream and 1/3 cup powdered sugar. Peel 6 clementines, removing the skin from each quarter. Build the Charlotte cake by alternating ladyfinger biscuits, whipped cream and the clementine quarters. Use clementines for the top layer and top with dots of whipped cream to finish. Let firm up in the fridge for at least 4 hours before serving.