1. Pizza is a national food of Italy and the Italian people love it. Pizza is a simple recipe but has so many variations and styles that it that it has become one of the most popular foods in the world. Basic pizza is a freshly made bread base with tomato sauce and cheese topping. You can add just about any food topping you like to pizzas, everything from pesto, ham, and onion to mushrooms, sausage, and spinach.