Sankaya (Thai Pandan Pudding)
Adding the egg yolk gives the pudding a richer flavor. Be sure to beat yolk thoroughly before adding so it doesn't set and you will be left with a chunky pudding.
Pudding may be watery. If so, let it settle for a few more minutes as pudding will firm up as it cools.
Pandan flavoring gives the pudding the light green coloring. It has a slight almond taste and can be purchased at any Asian food store. You can also substitute pandan flavor with vanilla extract.