Step 1 - In a small saucepan melt the sugar until it becomes pale caramel. Quickly pour the caramel into a rectangular dish and allow to cool.
Step 2 - In a large saucepan place the milk, sugar, cinnamon and orange peel and bring to a boil over medium heat. Remove 2 cups of milk from the pot and let cool.
Step 3 - In the blender place the cooled milk together with the flour and cornstarch and blend until the mixture is homogeneous. Gradually add to the milk in the pot and bring to a boil over medium heat, stirring constantly until the mixture is very thick.
Step 4 - Pour the mixture into the reserved caramel dish, even the surface and refrigerate until set. Serve cold with the liquid caramel in the dish or a wine sauce.