PREP: Spray a 9×13 pan with nonstick cooking spray. Place the diced bread in the baking pan; set aside. In a medium bowl, whisk together the milk, cream, sugar, eggs, pumpkin, vanilla, and pie spice. Pour the prepared custard over the prepared baking pan. Cover with plastic wrap and refrigerate for at least 3-4 hours and preferably overnight.

STREUSEL: Combine the light brown sugar, butter, all-purpose flour, pecans, and pumpkin spice in a small bowl. Using your fingertips, mix together until the butter breaks down into smaller pieces. Sprinkle the streusel mixture over the french toast casserole.

BAKE: When ready to bake, position a rack in the center of the oven and preheat oven to 350ºF. Sprinkle the prepared streusel mixture over the casserole evenly. Bake the casserole for 48-55 minutes or until the casserole is no longer jiggly. You may need to tent the casserole with a piece of foil if it starts browning too quickly around the 30-40 minute mark, I didn’t. Let cool for several minutes before slicing and serving! Let cool for a few minutes before serving. Serve with maple syrup, butter, and powdered sugar.