Bechamel white sauce is one of the most often used in French cooking, and is in fact considered one of the mother sauces of French cuisine since it's used as a base for other sauces like Mornay sauce. Best of of, Bechamel sauce is extremely easy to prepare.
Check out this food video to learn how to whip up a simple Bechamel sauce using flour and milk. Add some cheese (like parmesan) for a nice cheesy flavor.
Have an iPhone? Check out all 200+ new features coming in iOS 13.