Mexico

In Mexico, burgers (called hamburgesas) are served with ham and slices of American cheese (locally called queso americano) fried on top of the meat patty. The toppings include avocado, shredded lettuce, onion and tomato. The bun has mayonnaise, ketchup and mustard. In certain parts are served with bacon, which can be fried or grilled along with the meat patty. A slice of pineapple is also a usual option, and the variation is known as a "Hawaiian hamburger".