>>814790>pizza>kiddie meme foodPizza has been a staple on the diet of hardworking peasant for centuries. It's tasty, nutritive, can be made with whatever you have available and it's easy to cut, pack and transport back to the fields to eat later cold.
The pizza itself is Italian, but most European countries had their own version of "bread with cheese and whatever else we can throw on top this season".
Definitely not travel food, though. It requires a variety of ingredients and too much space. The camping pizza is a meme, not pizzas in general.