A pie is a baked dish which is usually made of a pastry dough casing that covers or completely contains a filling of various sweet or savoury ingredients. Pies can be either "filled", where a dish is covered by pastry and the filling is placed on top of that, "top-crust," where the filling is placed in a dish and covered with a pastry/potato mash top before baking, or "two-crust," with the filling completely enclosed in the pastry shell. Pies can be a variety of sizes, ranging from bite-size to ones designed for multiple servings.
The need for nutritious, easy-to-store, easy-to-carry, and long-lasting foods on long journeys, in particular at sea, was initially solved by taking live food along with a butcher/cook. However, this took up additional space on what were either horse-powered treks or small ships, reducing the time of travel before additional food was required. This resulted in early armies' adopting the style of hunter-foraging.
The introduction of the baking of processed cereals including the creation of flour, provided a more reliable source of food. Egyptian sailors carried a flat brittle bread loaf of millet bread called dhourra cake, while the Romans had a biscuit called buccellum.
The first pies appeared around 9500 BC, in the Egyptian Neolithic period or New Stone Age, when the use of stone tools shaped by polishing or grinding became common, the domestication of plants and animals, the establishment of permanent villages, and the practice of crafts such as pottery and weaving. Early pies were known as galettes, wrapping honey as a treat inside a cover of ground oats, wheat, rye or barley. These galettes developed into a form of early sweet pastry or desserts, evidence of which can be found on the tomb walls of the Pharaoh Ramesses II, who ruled from 1304 to 1237 BC, located in the Valley of the Kings.
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