Cut bread loaf into about 10 (3/4-inch-thick) slices.
Spread butter evenly over one cut side of each bread slice.
Arrange bread, butter side up, in an ungreased 13- x 9-inch baking dish.
Whisk together eggs and next 5 ingredients; pour over bread, pressing slices down. Cover and chill 8 hours.
Remove bread slices from baking dish, and place on two lightly greased baking sheets.
Bake, uncovered, at 350° for 45 minutes or until golden.