Hamburger a style of rich, juicy burger in 2012 which is known as a "dirty burger" or "third-wave burger". In recent years Rustlers has sold pre-cooked hamburgers reheatable in a microwave oven in the United Kingdom. In the UK, as in North America and Japan, the term "burger" can refer simply to the patty, be it beef, some other kind of meat, or vegetarian. Fast food franchises sell American style fast food hamburgers in Australia and New Zealand. The traditional Australasian hamburgers are usually bought from fish and chip shops or milk bars. The hamburger meat is almost always ground beef,
Hamburger onion rings or potato chips. In Mexico, burgers (called "hamburguesas") are served with ham and slices of American cheese fried on top of the meat patty. The toppings include avocado, jalapeño slices, 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". Some restaurants' burgers also have barbecue sauce, and others also replace the ground patty with sirloin, Al pastor meat, barbacoa