Butter 9-inch square pan. (I use 9 x 13 inch pan because I use slightly more French bread) Arrange bread slices, overlapping to fill pan completely. In medium bowl, combine eggs, milk, cream, vanilla, cinnamon, and nutmeg; mix well. Pour over bread slices; cover and refrigerate overnight. Next day: preheat oven to 350 degrees F. In small bowl, combine butter, sugar, walnuts, and corn syrup; mix well. Evenly spread nut mixture over bread. Bake 40 minutes or until puffed and golden. Serve with maple syrup.