In a large bowl, whisk together granulated sugar and ground cinnamon.
In a medium-size bowl, whisk together the eggs and egg yolks along with ground cinnamon, fine sea salt, light brown sugar, and grated nutmeg.
Once combined, whisk in heavy cream and whole milk. Pour into a dish/container.
Cut brioche bread into 1.5-inch thick slices. Using a knife, cut a 2-inch slit to the bottom of the bread, and about 70% of the way into the bread.
Slip a piping bag of Nutella into the bread, and fill the bread up with Nutella.
Dunk the slices into the custard and sit for a few seconds.
In a large pan greased with melted unsalted butter, lay in two slices of bread and cook/toast for 3 minutes. Flip and repeat.
Once fully toasted, immediately toss the bread into the cinnamon-sugar mixture and coat every single side.
Add to a plate and top with whipped cream, and a drizzle of maple syrup.
