Instructions:
While they're baking, you can make the chocolate sauce that goes inside. Simmer the milk in a saucepan and then remove from the heat. Whisk the yolks and sugar together in another bowl, then stir in the starch. Add the hot milk into the sugar mix and whisk quickly while adding. Put it back in the pan and cook on medium low heat while whisking. Cook to boiling, then let boil for 1 minute before removing. Add the chocolate in and whisk until melted. Put in a bowl and cool to room temperature. Stir to avoid getting a skin. Refrigerate it until it's time to use. When the rolls are being served, right before they go to the table, split them or open a little hole (they're easy to open) and spoon a big glob of pudding in there. Tastes like an éclair.
NOTE: You can eat the rolls by themselves too, they taste very good. In fact, originally these were two separate recipes.