Combine first 4 ingredients with a wire whisk in a shallow dish.
Dredge 2 slices of bread in egg mixture, letting slices soak 15 to 20 seconds on each side.
Heat a large nonstick skillet coated with cooking spray over medium heat. Place dredged bread slices in pan; cook 2 to 3 minutes on each side until lightly browned. Repeat with remaining bread slices. Serve with maple syrup.