Preparation Arrange rack in center of the oven and preheat to 350°F. Lightly butter 9- by 13-inch glass baking dish or 14-inch oval gratin dish. Pour in maple syrup; scatter bread cubes and raspberries in dish. In large bowl, whisk together eggs, milk, lemon zest, and salt; pour over bread cubes. Bake strata until puffed and golden brown, about 45 minutes. Transfer to rack to cool 5 minutes, then serve warm with additional maple syrup.
Preparation Arrange rack in center of the oven and preheat to 350°F. Lightly butter 9- by 13-inch glass baking dish or 14-inch oval gratin dish. Pour in maple syrup; scatter bread cubes and raspberries in dish. In large bowl, whisk together eggs, milk, lemon zest, and salt; pour over bread cubes. Bake strata until puffed and golden brown, about 45 minutes. Transfer to rack to cool 5 minutes, then serve warm with additional maple syrup.