Start this recipe by making a red wine syrup. Put the red wine and sugar in a saucepan and add the juice and zest of one orange. Bring to the boil, then turn down the heat and reduce the liquid to 2/3 of its quantity .Turn off the heat, and leave to red wine syrup to cool. Next, place the melted chocolate into a large bowl, and whisk in the cold wine syrup to produce a nice chocolate sauce. Put the milk and cream into another saucepan, and heat together till almost boiling. Quickly add in the egg yolks and the chocolate sauce and whisk together till you have thick, glossy custard. Pour the chocolate custard into your serving pots and leave to cool in the fridge for at least 2 hours or overnight, till completely set. All that is left to do is to prepare the orange mascarpone. Place the mascarpone in a small bowl and add the orange liqueur. Next, remove the zest from the remaining orange and add it to the mascarpone cheese. Peel and segment the orange. Add the orange segments to the mascarpone cheese and mix well. Remove the chilled chocolate pots from the fridge and serve with a generous dollop of the orange mascarpone on top.