French toast is basically bread pudding made in a frying pan instead of the oven. French toast was originally a way of using up stale bread. In fact, in French it is called pain... or ‘throwaway bread.’
If using good ingredients, French toast can be a healthy breakfast far removed from the fantasy brunch meal it has become, smothered in syrup and powdered sugar. Eggs, milk, and good-quality bread are the essence of great French toast. Instead of using refined, white breads such as challah, try making French toast with whole-grain rye or whole-wheat bread. Or try some other fancy, whole-grain bread, like a cranberry-walnut loaf.