Berry French Toast Casserole

Name: Berry French Toast Casserole
Cook time: 20 min
Total time: 20 min
Cuisine: French, European, Mediterranean
Ingredients: 2 tablespoons unsalted butter; One 1-pound, day-old unsliced loaf white bread; 2 1/2 cups mixed berries, such as blueberries, raspberries and blackberries; 3 cups milk; 2/3 cup granulated sugar; 1/2 cup heavy cream; 2 teaspoons pure vanilla extract; 1/2 teaspoon pure almond extract; 6 large eggs; Kosher salt; Confectioners' sugar, for dusting; Warm maple syrup, for serving