Created by lazyme on February 7, 2015
Step 1: In a small heavy saucepan melt butter with brown sugar and corn syrup over moderate heat, stirring, until smooth and pour into a 13- by 9- by 2-inch baking dish.
Step 2: Cut six 1-inch thick slices from center portion of bread, reserving ends for another use, and trim crusts.
Step 3: Arrange bread slices in one layer in baking dish, squeezing them slightly to fit.
Step 4: In a bowl whisk together eggs, half-and-half, vanilla, Grand Marnier, and salt until combined well and pour evenly over bread.
Step 5: Chill bread mixture, covered, at least 8 hours and up to 1 day.
Step 6: Preheat oven to 350F and bring bread to room temperature.
Step 7: Bake bread mixture, uncovered, in middle of oven until puffed and edges are pale golden, 35 to 40 minutes.
Step 8: Serve hot French toast immediately.