These sandwiches typically consist of slices of sandwich bread with cheese in between. The cheese might be sliced or grated, and the sandwiches are then grilled, toasted, or fried so that the cheese melts. Apart from cheese, melt sandwiches can be filled with a variety of other ingredients, but depending on the choice of other ingredients, the sandwiches might become something entirely different, such as tuna melt sandwich (with added tuna and mayonnaise) or patty melt (with added meat patties).