This is a relatively hot curry which is usually served during Christmas and other special occasions by the Cristao (pronounced Cristang) community in Malacca, Malaysia. They are descendants of the Portuguese invaders who married locals during their reign in Malaysia. This recipe uses candlenuts and galangal; candlenuts are hard tropical nuts used in Southeast Asian cooking and available in Indian or Asian markets. Galangal is a rhizome similar to ginger with a hot, ginger-peppery flavor, used primarily as a seasoning. It is also available in Asian markets.