A cheeseburger is a popular type of sandwich that consists of a cooked beef patty topped with one or more slices of cheese. The cheese is usually melted and can vary in type, including cheddar, American, or Swiss. The cheeseburger is typically served in a bun, which is often toasted, and can be garnished with various toppings such as lettuce, tomato, onion, and pickles. Cheeseburgers are commonly found in fast-food restaurants and diners, making them a staple in American cuisine. They can be customized to suit individual tastes, with options for different meats, including turkey or veggie patties. The dish is often accompanied by sides like fries or onion rings.