Family favorite - I make it at holidays and when out-of-town guests visit.

Creme Brulee French Toast 
Ingredients

    * 1/2 cup (1 stick) unsalted butter
    * 1 cup packed brown sugar
    * 2 tablespoons corn syrup
    * 1 (8 to 9) inch round loaf Challah bread
    * 5 large eggs
    * 1 1/2 cups half and half
    * 1 teaspoon vanilla
    * 1 teaspoon Grand Marnier
    * 1/4 teaspoon salt

Directions

In a small heavy saucepan melt butter with 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. Cut 6 (1-inch) thick slices from center
portion of bread, reserving ends for another use, and trim
crusts. Arrange bread slices in one layer in baking dish, squeezing
them slightly to fit. In a bowl whisk together eggs, half and half,
vanilla, Grand Marnier and salt until combined well and pour evenly
over bread. Chill bread mixture, covered, at least 8 hours and up to 1
day.

Preheat oven to 350 degrees F and bring bread mixture to room
temperature. Bake uncovered, in middle of oven until puffed and edges
are pale golden, 35 to 40 minutes.

From the Food Network