Creating French Toast Casserole is a straightforward process when you follow these steps:

1. Prepare the Bread: Cut the bread into 1-inch cubes and place them in a large baking dish or casserole pan.
2. Mix the Egg Mixture: In a large bowl, whisk together the eggs, milk, heavy cream, sugar, vanilla extract, cinnamon, and salt until fully combined.
3. Combine Bread and Egg Mixture: Pour the egg mixture evenly over the bread cubes. Use a spatula to gently push down any bread that floats to the surface, ensuring all pieces are soaked.
4. Soak: Cover the baking dish with plastic wrap and refrigerate for at least 4 hours, preferably overnight. This allows the bread to soak up the custard mixture fully.
5. Preheat Oven: When ready to bake, preheat your oven to 350°F (175°C).
6. Add Maple Syrup: Drizzle maple syrup over the soaked bread mixture for added sweetness.
7. Bake: Remove the plastic wrap and bake in the preheated oven for 45-50 minutes, or until the casserole is puffed and golden brown and a knife inserted in the center comes out clean.
8. Cool: Allow the casserole to cool slightly for about 10-15 minutes before serving.
9. Serve: Cut into squares and serve warm with additional maple syrup, fresh berries, or whipped cream if desired.