Sausages are a type of meat product usually made from ground meat, often pork, beef, or poultry, along with salt, spices, and other flavorings. Other ingredients such as grains or breadcrumbs may be included as fillers. Traditionally, sausage casings were made of cleaned intestines, but today, natural casings are often replaced by collagen, cellulose, or even plastic casings, especially in industrially manufactured sausages. Vegetarian and vegan sausages are also available in some countries, and they can be made from scratch.
Sausages can be made from a variety of meats, including beef, pork, poultry, or game meat. The meat is ground, mixed with salt and other seasonings, and then stuffed into casings. Sausage making is a way to use less tender, low-value cuts and trim pieces of meat, and it has been a popular and "quick-and-easy" meal for generations.
In summary, sausages are primarily made from ground meat, salt, spices, and other flavorings, and they can be encased in natural or synthetic casings. They can be made from a variety of meats, and sausage making is a way to utilize less tender cuts and trim pieces of meat.