Cashews: Cashew nuts are kidney shaped seeds of the cashew apple fruit of the cashew tree. The cashew tree is a native of Amazon forest which was later spread to the world by the Portuguese. It is now commercially cultivated in Brazil, India, Vietnam & other African countries. Like all other nuts, cashews are a rich source of proteins & fiber. It is high in calories, too. Cashew nuts are rich in mono-unsaturated fat & have a high percentage of Oleic acid which promotes good cardiovascular health.