Prepare this recipe the night before or at least six hours prior to cooking and serving to allow time for bread to absorb the egg/milk mixture.
In a small mixing bowl, combine brown sugar, cinnamon, nutmeg and butter.
Lightly spray a 9" x 13" (3-litre) glass baking dish with cooking spray.
Sprinkle 1/3 of the mixture into prepared baking dish.
Arrange six pieces of bread on top of the sugar mixture, squeezing them in tight.
Sprinkle another 1/3 of the sugar mixture and the berries on top of that.
Stack the remaining six pieces of bread on top of the first six.
Sprinkle with the final 1/3 of sugar mixture.
In a large mixing bowl, beat eggs, milk, vanilla and salt together.
Pour milk mixture evenly over top of the bread, ensuring all slices are soaked.
Press down lightly and then cover with tin foil or plastic wrap.
Store dish in the fridge overnight (or at least six hours).
Uncover and bake in preheated oven at 350 degrees for 40-45 minutes (or until the top is golden brown).
Using a sifter, dust with cinnamon or icing sugar and serve with warm maple syrup.