Grilled cheese sandwich

The grilled cheese is a hot cheese sandwich typically prepared by heating slices of cheese between slices of bread with a cooking fat such as butter or mayonnaise on a frying pan, griddle, or sandwich toaster, until the bread browns and the cheese melts. The 1861 English recipe book Mrs. Beeton's Book of Household Management includes a recipe for placing sandwiches of bread and butter with 1⁄2-inch (13 mm) slices of "a nice fat Cheshire or any good rich cheese" into an oven, and serving when the bread becomes toasted. The cheese dream, an open-faced grilled cheese sandwich, became popular in the U.S. during the Great Depression. U.S. government cookbooks describe Navy cooks broiling "American cheese filling sandwiches" during World War II.

Source: Wikipedia