godan verb (-su), transitive verb
steam (food); cook by steaming
Transitive verb used when you steam food, often with a lid on, to make it soft or bring out flavor. Common in cooking contexts.
野菜を蒸らしてからサラダに加える。
I steam the vegetables and then add them to the salad.
ご飯を炊いたら、しばらく蒸らしてください。
After cooking the rice, let it steam for a while.