Let ice cream and sherbet soften slightly. In a loaf pan lined with waxed paper, press a 1-inch layer of vanilla ice cream into bottom of the loaf pan. Next, press a 1-inch layer of orange sherbet on top of vanilla. Continue to layer in this fashion until the loaf pan is full, ending with vanilla ice cream. Cover with waxed paper and chill until solid. Invert pan and turn onto a plate. To serve, cut slices to desired thickness and garnish with an orange peel curl and fresh mint leaves, if desired. This will taste like a Dreamsicle.