Peel oranges so that the white skin is completely removed. Remove the fillets with a sharp knife between the parting skins. Chop the chocolate. Put the liqueur in a shallow bowl. Cut each ladyfingers into 3 pieces and dip them briefly into the liqueur. Layer the sponge cakes, orange fillets, chocolate and pudding alternately in 4 glasses (approx. 250 ml content). Serve decorated with mint