Let’s dive into the steps to create this mouthwatering breakfast treat:

1. Preheat your oven to 350°F (175°C) and lightly grease a 9×13 inch baking dish.
2. In a large mixing bowl, whisk together the eggs, whole milk, heavy cream, granulated sugar, brown sugar, vanilla extract, cinnamon, and salt until well combined.
3. Add the cubed bread to the baking dish, spreading it out evenly.
4. Pour the egg mixture over the bread cubes, making sure all pieces are coated. Press down lightly with a spatula to help the bread soak up the custard.
5. Sprinkle with chopped nuts if using, then drizzle the melted butter over the top.
6. Bake in the preheated oven for 35-40 minutes, or until the top is golden brown and the casserole is set.
7. While the casserole bakes, prepare the glaze by mixing the powdered sugar with maple syrup until smooth.
8. Remove the casserole from the oven and let it cool slightly before drizzling with the glaze.

This recipe is akin to the lessons I learned at my grandmother’s side — patience and attention to detail yield the most delicious results.