Beat whipping cream and icing sugar in chilled medium bowl with electric mixer on high speed until stiff peaks form. Fold in lemon curd and lemon peel. Place 1 cake layer, rounded side down, on serving plate. Spread with 1 cup of the lemon mixture to within 1/4 inch of edge. Top with second layer. Frost side and top of cake with remaining lemon mixture. Store loosely covered in refrigerator.