Kaya is a coconut jam that is popular and easy to find in Singapore and Malaysia. It is commonly paired with bread/toast and eaten during breakfast. Although it may not be easy to find in all parts of the world, you can definitely make it at home with only four ingredients. In fact, after making it at home, I prefer it to store-bought as you can control the amount of sugar you put in. I would say the proportions are a bit flexible and you could add less/more sugar to taste, or include more pandan juice for a vibrant green colour.
As you may notice in my photos, one jar of my kaya is greener in colour than the other. This is because I made one batch with regular white sugar (yields a lighter, green colour) and the other with coconut sugar (which is brown in colour, and is meant to be a healthier option). I hope you will give this a try! I had mine with some home-made milk bread and the pairing was delectable.