Some peoples think French food is some super fancy restaurant-level stuff or something.
But one of the most popular food in France is the Jambon-Beurre. Which, as the name say it, is just a Baguette with butter and ham.
So if you never had one, and you go to France: Try to find a good bakery (Usually the ones with a queue during break time), and try one.
Well, unless you are vegetarian, obviously.