When making this rice pudding, keep in mind that it will continue to thicken after the rice is added and as it cools. Please feel free to adjust the amount of cornstarch and thickness to your taste, as the starch content of all types of rice isn't the same. To thin, add more eggnog or you could use half and half or cream. You can even do this after chilling. Simply add and stir to thin, if desired.