Preheat the Oven: Preheat your oven to 350°F (175°C).
Slice the Bread: Cut bread into 1-inch cubes.
Mash the Bananas: Mash ripe bananas until smooth and mix with cinnamon, nutmeg, and ginger.
Whisk the Eggs and Sugar: In a separate bowl, whisk together eggs, egg yolks, brown sugar, and white sugar until smooth.
Add the Milk: Gradually whisk in the milk to the egg mixture.
Combine Ingredients: Fold the mashed bananas into the custard. Pour the custard mixture over the bread cubes in a large mixing bowl, ensuring the bread is well-coated. Let it sit for 10 minutes.
Prepare Baking Dish: Grease a baking dish with butter or non-stick spray.
Assemble and Bake: Pour the mixture into the baking dish and bake for 45-50 minutes, or until golden brown and set. Cool for 15 minutes before serving.