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History of Sausage
Sausages are a result of economical butchery. Traditionally, sausage-makers put to use tissues and organs which are perfectly edible and nutritious, but not particularly appealing - such as scraps, organ meats, blood, and fat - in a form that allows for preservation: typically, salted and stuffed into a tubular casing made from the cleaned and turned inside-out intestine of the animal, producing the characteristic cylindrical shape. Hence, sausages, puddings and salami are amongst the oldest of prepared foods, whether cooked and eaten immediately or dried to varying degrees.
The first sausages were made by early humans, stuffing roasted intestines into stomachs. As early as 589 BC, a Chinese sausage làcháng was mentioned consisting of goat and lamb meat. The Greek poet Homer, mentioned a kind of blood sausage in the Odyssey, and Epicharmus wrote a comedy titled The Sausage. Evidence suggests that sausages were already popular both among the ancient Greeks and Romans, and most likely with the illiterate tribes occupying the larger part of Europe.
Traditionally, sausage casings were made of the cleaned intestines, or stomachs in the case of haggis and other traditional puddings. Today, however, natural casings are often replaced by collagen, cellulose or even plastic casings, especially in the case of industrially manufactured sausages. Some forms of sausage, such as sliced sausage, are prepared without a casing. Additionally, luncheon meat and sausage meat are now available without casings in tin cans and jars.
The most basic sausage consists of meat, cut into pieces or ground, and filled into a casing. The meat may be from any animal, but traditionally is pork, beef or veal. The meat to fat ratio is dependent upon the style and producer, but in the United States, fat content is legally limited to a maximum of 30%, 35% or 50%, by weight, depending on the style. The United States Department of Agriculture defines the content for various sausages and generally prohibits fillers and extenders. Most traditional styles of sausage from Europe and Asia use no bread-based filler and are 100% meat and fat excluding flavorings. In the UK and other countries with English cuisine traditions, bread and starch-based fillers account for up to 25% of ingredients. The filler used in many sausages helps them to keep their shape as they are cooked. As the meat contracts in the heat, so the filler expands and absorbs the moisture lost from the meat.