Creating your amazing French Toast Casserole is easy when you follow these simple steps:

1. Prepare the Bread: Cut the loaf of French bread into 1-inch cubes and place them in a large greased baking dish.
2. Mix the Custard: In a large mixing bowl, whisk together the eggs, whole milk, heavy cream, granulated sugar, vanilla extract, cinnamon, nutmeg, and salt until well combined.
3. Combine: Pour the custard mixture evenly over the bread cubes, ensuring all bread is coated. Gently press down to soak the bread.
4. Chill: Cover the baking dish with plastic wrap and refrigerate for at least 4 hours, or overnight, to allow flavors to meld.
5. Preheat Oven: When ready to bake, preheat your oven to 350°F (175°C).
6. Bake: Remove the plastic wrap and bake uncovered for about 45 minutes, or until the top is golden brown and the custard is set.
7. Cool: Let the casserole cool for 5-10 minutes before serving. This will help it set further.
8. Serve: Drizzle with maple syrup and top with powdered sugar and berries if desired.

These easy steps will help you create a delicious French Toast Casserole that everyone will love.