Now let’s dive into the steps for creating your delectable Crème Brûlée French Toast Casserole:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with non-stick cooking spray or butter.
2. Prepare Bread: Place the cubed bread into the prepared baking dish, spreading it out evenly.
3. Make Custard Mixture: In a large mixing bowl, whisk together the eggs, heavy cream, whole milk, 3/4 cup of granulated sugar, vanilla extract, cinnamon, salt, and nutmeg until well combined.
4. Combine: Pour the custard mixture evenly over the bread cubes, ensuring every piece is soaked. Gently press down the bread with a spatula to help it soak up the custard.
5. Refrigerate: Cover the dish with plastic wrap and refrigerate for at least 30 minutes, or preferably overnight for better flavor melding.
6. Bake: Remove the cover and place the casserole into the preheated oven. Bake for about 35-40 minutes or until the top is set and golden brown. The center of the casserole should be slightly custardy but not runny.
7. Cool Briefly: Once baked, remove from the oven and let cool for 5-10 minutes before proceeding.
8. Caramelize Topping: Sprinkle the turbinado sugar evenly over the top of the casserole. Using a kitchen torch, carefully caramelize the sugar until it forms a crispy, golden crust (if you do not have a torch, you can place it under the broiler for 2-4 minutes, watching closely to avoid burning).
9. Slice and Serve: Once the sugar has caramelized, slice the casserole and serve warm.
10. Garnish (Optional): Top individual servings with fresh berries and drizzle with maple syrup if desired.

With these steps, your Crème Brûlée French Toast Casserole will be ready to enjoy in no time!