Combine first 6 ingredients in a large bowl, stirring well with a whisk.
Heat a large nonstick skillet or griddle over medium heat. Coat pan with cooking spray. Dip 4 bread slices (twice on each side) in egg mixture. Cook 2 minutes on each side or until browned. Set aside, and keep warm. Repeat procedure with remaining bread and egg mixture. Serve with banana slices and, if desired, syrup.