Kaya (or Serikaya) is an Asian coconut egg custard that is eaten spread on thin toast with lots of butter. Is it a traditional breakfast in Singapore and Malaysia. The directions in this recipe come from "Cook Malaysian" by Lee Sook Ching, with a slightly modified ingredient list to make things simpler for people outside of Asia. I find pandan leaves in my local Asian market, but I have also used pandan extract with good results. It can be omited, but the flavor won't be the same. I press the mixture through a sieve before bottling.