Argentina is rich in Italian ancestry, due to waves of Italian immigrants in the 19th and 20th centuries. El Cuartito, founded in 1934 in the Buenos Aires barrio of Recoleta, is one of the oldest pizzerias in the city. Pizzas are cooked in a gas oven, in heavy cast-iron pans, then turned out to serve. The result? A thick crust with a satisfying crunch that houses a tender, airy interior. The menu, in English and Spanish, features 25 pizza combinations. What they have in common: overflowing cheese. Try the fugazetta – a deep-dish tomato-less pizza with sautéed onions, mozzarella, grated Parmesan, oil and salt. The super-sweet onions, so soft they seem to dissolve, get crisp from the super-hot gas oven while the ample cheeses ooze over the sides.