A Xis, also known as a Xis gaúcho, is a sandwich from the Brazilian state of Rio Grande do Sul that was inspired by the American cheeseburger. The sandwich consists of meat, cheese, lettuce, tomato, peas, corn, and mayonnaise served on a bread bun larger than a typical hamburger bun (around 18 cm diameter). The meat used can vary with some common choices being a beef patty, chicken hearts, fish fillets, chicken breast, calabresa sausage, bacon, or fried eggs. Vegetarian variants that use meat alternatives exist. The sandwich is pressed on a grill and served hot.
The sandwich is commonly eaten for dinner after social events.