The orange is the most frequently cultivated citrus fruit in the world. It originally came from Asia and was only introduced to Europe in the 15th century. Its peel contains numerous essential oils and the taste is similar to the fruit pulp in its fruitiness but not quite as sweet and slightly bitter.
Cinnamon
Cinnamon is among the most expensive spices in the world and was supposedly already used as a spice in China in 3,000 B.C. Cinnamon is extracted from the bark of the South-Asian cinnamon tree. It has an aromatic-sweetish taste and contains valuable essential oils.
Coriander
In the Middle East and Asia, the slightly sweetish tasting coriander is used in almost every dish, presumably due to its splendid aroma that is reminiscent of a spicy-savoury mixture of cinnamon, nutmeg and orange.