Stuffing

Stuffing, filling, or dressing is an edible mixture, often composed of herbs and a starch such as bread, used to fill a cavity in the preparation of another food item. Many foods may be stuffed, including poultry, seafood, and vegetables. As a cooking technique stuffing helps retain moisture, while the mixture itself serves to augment and absorb flavors during its preparation.
Poultry stuffing often consists of breadcrumbs, onion, celery, spices, and herbs such as sage, combined with the giblets. Additions in the United Kingdom include dried fruits and nuts (such as apricots and flaked almonds), and chestnuts.
History.
It is not known when stuffings were first used. The earliest documentary evidence is the Roman cookbook, Apicius "De Re Coquinaria", which contains recipes for stuffed chicken, dormouse, hare, and pig. Most of the stuffings described consist of vegetables, herbs and spices, nuts, and spelt (an old cereal), and frequently contain chopped liver, brains, and other organ meat.
Names for stuffing include "farce" (~1390), "stuffing" (1538), "forcemeat" (1688), and relatively more recently in the United States; "dressing" (1850).
Cavities.
In addition to stuffing the body cavity of animals, including birds, fish, and mammals, various cuts of meat may be stuffed after they have been deboned or a pouch has been cut into them. Recipes include stuffed chicken legs, stuffed pork chops, stuffed breast of veal, as well as the traditional holiday stuffed turkey or goose.
Many types of vegetables are also suitable for stuffing, after their seeds or flesh has been removed. Tomatoes, capsicums (sweet or hot peppers), vegetable marrows (e.g., zucchini) may be prepared in this way. Cabbages and similar vegetables can also be stuffed or wrapped around a filling. They are usually blanched first, in order to make their leaves more pliable. Then, the interior may be replaced by stuffing, or small amounts of stuffing may be inserted between the individual leaves.
Purportedly ancient Roman, or else Medieval, cooks developed engastration recipes, stuffing animals with other animals. An anonymous Andalusian cookbook from the 13th century includes a recipe for a ram stuffed with small birds. A similar recipe for a camel stuffed with sheep stuffed with bustards stuffed with carp stuffed with eggs is mentioned in T.C. Boyle's book "Water Music". Multi-bird-stuffed dishes such as the turducken or gooducken are contemporary variations.
Fillers.
Almost anything can serve as a stuffing. Many Anglo-American stuffings contain bread or cereals, usually together with vegetables, herbs and spices, and eggs. Middle Eastern vegetable stuffings may be based on seasoned rice, on minced meat, or a combination thereof. Other stuffings may contain only vegetables and herbs. Some types of stuffing contain sausage meat, or forcemeat, while vegetarian stuffings sometimes contain tofu. Roast pork is often accompanied by sage and onion stuffing in England; roast poultry in a Christmas dinner may be stuffed with sweet chestnuts. Oysters are used in one traditional stuffing for Thanksgiving. These may also be combined with mashed potatoes, for a heavy stuffing. Fruits and dried fruits can be added to stuffing including apples, apricots, dried prunes, and raisins. In England, a stuffing is sometimes made of minced pork shoulder seasoned with various ingredients, sage, onion, bread, chestnuts, dried apricots, dried cranberries etc. The stuffing mixture may be cooked separately and served as a side dish. This may still be called stuffing or it may be called dressing.
Food safety.
The United States Department of Agriculture (USDA) states that cooking animals with a body cavity filled with stuffing can present potential food safety issues. These can occur because when the meat reaches a safe temperature, the stuffing inside can still harbor bacteria (and if the meat is cooked until the stuffing reaches a safe temperature, the meat may be overcooked). For turkeys, for instance, the USDA recommends cooking stuffing separately from the bird and not buying pre-stuffed birds.