1. To prepare casserole, place bread in greased 11 x 7-inch (2.5L) baking dish. Using an electric mixer, beat cream cheese until softened. Beat in milk in steady drizzle, then grapefruit juice. Whisk in eggs, vanilla, cinnamon and salt until combined. Pour over bread, pressing down to soak bread evenly. Sprinkle brown sugar and drizzle maple syrup over top. Cover and refrigerate for at least 1 hour or overnight.