Preheat oven to 375 degrees. In a medium bowl, toss bread with butter until coated. In a large bowl, toss together apples, brown sugar, maple syrup, nutmeg, prunes, brandy, juice, and half the bread until combined. Transfer mixture to an 8-inch square baking dish and top with remaining bread.
Cover with foil and bake until mixture is bubbling and apples are tender, about 40 minutes. Uncover and bake until top is browned, 10 to 15 minutes. Let cool 15 minutes. Serve with ice cream or whipped cream.
Grade A maple syrup is lighter in flavor than darker, more robust Grade B; both will work in this recipe.