A growing interest in international sandwiches and street foods has given rise to two Mexican mainstays. Typically served on a long crusty roll, tortas may be eaten cold, hot, grilled or toasted with such fillings as avocado, poblano, jalapeño, ham or adobo meat. Cemitas commonly are served on an egg roll topped with sesame seeds and may include carnitas or beef milanesa, which is a thin, fried piece of beef, topped with shredded or hand-pulled Mexican string cheese.