Pies, often seen as desserts in Korea, are actually a staple food in Western cultures, where they fill pastries with meats or various ingredients. Originating as far back as ancient Greece, pies became widespread during the Middle Ages as Crusaders brought them to Europe. Today, there are numerous types of pies, including meat pies with chicken or lamb, and sweet pies like pumpkin, apple, or pecan. The pie has even become a cultural symbol in places like the USA, symbolizing warmth and family values. Pies are also used in idiomatic expressions like "easy as pie," meaning something very simple to do. In Korea, the concept of pie is growing, with specialized pie shops offering varieties from different countries like Britain and New Zealand.