What to do with a leftover tub of homemade red currant ice cream? Make ice cream cake, of course! When completely cooled, slice a round sponge cake / pan di spagna into two disks. Wedge the first disk into the bakery paper-lined cake pan and spread a layer of softened ice cream on top. Proceed with the next layer of cake and ice cream (for my top layer I used whipped cream with mixed berries), and place back in the freezer for at least an hour. Remove and let sit at room temp for minimum 15 minutes before serving.