Cut each slice of brioche in half and line the bottom of the baking dish with the slices, overlapping them slightly. Scatter half the raisins over the slices, then spoon on about a third of the egg mixture. Top with a second layer of slices and the remaining raisins. Pour in remaining egg mixture. Set aside for 30 minutes.
06Preheat oven to 300 degrees. Sprinkle the top of the pudding with cinnamon. Put in the oven and bake for about one hour, until the pudding is set. Serve while still warm.