Preheat oven to 375 degrees Fahrenheit.
In a large mixing bowl, combine the milk, heavy cream, eggs, granulated sugar, vanilla extract, ground cinnamon, ground nutmeg, and salt. Whisk until well combined. Set aside.
2 cups whole milk, 1/2 cup heavy cream, 6 large eggs, 1/2 cup granulated sugar, 1 teaspoon vanilla extract, 3/4 teaspoon ground cinnamon, 1/4 teaspoon ground nutmeg, 1/4 teaspoon salt
Butter a 9x13 inch baking dish. Arrange the croissant pieces in the base of the baking dish. Pour the egg mixture over the croissant pieces.
6 large croissants
Cover the baking dish with foil, and bake, in preheated oven, for 30 minutes. Remove the foil and bake for a further 10 minutes, or until the egg mixture has set and the top of the casserole is golden in color.
Serve while warm with fresh strawberries, blueberries, and maple syrup.
Fresh strawberries, Fresh blueberries, Maple syrup