Morning Delight French Toast Casserole

Ingredients

• 1/3 cup all-purpose flour
• 1 pinch ground nutmeg
• 1/4 cup unsalted butter, cold, diced into small cubes
• 6 large eggs
• 3/4 teaspoon ground cinnamon
• 1 cup heavy cream
• 1 cup whole milk
• 1.5 teaspoons vanilla extract
• 2 tablespoons melted butter
• 1/3 cup packed light brown sugar
• 1 teaspoon powdered sugar for dusting
• 1/8 teaspoon salt
• 16 ounces sourdough bread, cut into 1-inch cubes
• Maple syrup for serving
• 3 tablespoons granulated sugar