Enchiladas can be either rolled or flat, depending on the regional and cultural variations of the dish. Flat enchiladas, also known as enchiladas montadas, are more traditional in Mexico, while the rolled variety are more common in the United States.
Flat enchiladas are made by layering the ingredients in a baking dish, starting with a layer of tortillas, and then a layer of filling (beef, refried beans and then cheese). The process is repeated until the baking dish is full.