Beat half and half, eggs, sugar and vanilla until sugar is dissolved.
Brush waffle iron with butter or spray with non stick cooking spray
Dip a slice of bread in batter for about 3 seconds and cook in the waffle iron according to its settings. (as many as can fit in your waffle iron at a time)
Cook according to the settings on your waffle iron. Place on a wire rack on a sheet pan as you cook the rest of the French Toast Waffles. Keep them warm in the oven until ready to serve.