Many have said staying in the capital without savoring com would be a major shortcoming of a Hanoi experience.
Legend has it that one autumn a thousand years ago when farmers in Vong village were going to harvest their sticky rice, a storm came and caused huge damage to the crops.
The villagers tried to pick the remaining green rice from the storm-torn paddy fields and brought it home to stir fry.
The rice became a newly-invented dish and had helped them survive through hard days. Through generations, locals added more skills during the processing of com until they found it tasted so good that it eventually became more perfect and even went beyond the village to win the favor of all the citizens.
Ever since then, villagers have made com every autumn when the green rice is ready to harvest.
To make com, villagers work hard from about 5 a.m. to pick green sticky rice jeweled with dew.
Skill and hard work are needed to make authentic com flat, lime-green, chewy, sticky and smell pleasant like the scent of green rice, so many of the makers have to learn how to make com from a very young age.
The speciality is sold by street vendors or in shops. It can also be found on the breakfast or buffet menu of many hotels in Hanoi.
There are also com cakes - a Vietnamese must-have for happy occasions, including weddings and the Lunar New Year.