Smoked deli beef, also known as pastrami, is a type of cured and smoked meat made from beef. It is usually served on rye bread with mustard and pickles. It is a popular sandwich filling in the United States and other parts of the world. The meat is cured with a combination of spices, including garlic, coriander, black pepper, and paprika, before being smoked. The result is a flavorful and juicy meat that is perfect for sandwiches.