1. Preheat the oven to 150oC/Gas mark 2. Cut each pain au chocolate into three equal pieces across widthways and pack them into the ovenproof dish.
2. Pour the milk and cream into a saucepan and bring it to the boil. Drop in the chocolate and stir until it has melted and become smooth.
3. Mix the sugar and eggs together in a bowl and pour the chocolate mixture over, whisking all the time. Then slowly pour the custard over the pain au chocolate, allowing the custard to be absorbed before adding more.
4. Bake for 25-30 minutes or until the top is slightly crisp and the centre still wobbly. Serve warm with cream or ice cream.
Stir a little finely grated orange zest or a handful of raisins soaked in a tablespoon of rum into the milk as it comes to the boil. For something a little more fruity, scatter some cherries, or diced poached pear among the pain au chocolate before pouring on the custard.
Recipe from Gü Cookbook, Harper Collins 2012