Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Kosher restaurant
Kosher "fleishig" (meat) establishments often serve meat dishes popular within Middle Eastern cuisine, such as Shawarma, along with common American fast food staples like hot dogs and hamburgers. Fish may also be served at fleishig restaurants, though it cannot be served on the same plate as meat. Kosher Chinese restaurants are also common. These are mostly either fleishig or vegetarian (serving only "pareve" food). In recent years, a tradition has developed in Jewish communities to eat Chinese food on Christmas Day (and Christmas Eve), as many Chinese restaurants are open on these days. This phenomenon is the subject of the song "Chinese Food on Christmas."