Pour the egg mixture over the bread, and if baking right away allow to sit for 20 minutes at room temperature to soak up the custard mixture. Or, if you’re making this ahead, cover with plastic wrap and store in the fridge until the next morning.
Bake in the preheated oven for 40 minutes or until the internal temperature of the custard is 160°F/70°C and the top is golden brown. Dust with powdered sugar, and serve warm with maple syrup and fresh berries.