Step 1:
Preheat your oven to 350°F (175°C). Place the cubed French bread on a baking sheet and toast in the oven for about 10 minutes, or until slightly crispy.
Step 2:
In a large mixing bowl, whisk together the heavy cream, whole milk, granulated sugar, brown sugar, eggs, vanilla extract, cinnamon, and nutmeg until well combined.
Step 3:
Add the toasted bread cubes to the mixture, ensuring all pieces are well-coated. Let it sit for about 30 minutes to allow the bread to soak up the liquid. Fold in the chopped pralines.
Step 4:
Pour the mixture into a greased 9x13-inch baking dish. Bake in the preheated oven for 45-55 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.