Do you use the dry cornmeal or do you add it to water? I am also looking for new ways to get rid of the sand (whether it is cilantro, parsley, fresh spinach, etc...) Just me but biting into sand sort of ruins the dish (and after all that work!)
I toss into a sink or bowl full of water. It’s how we remove sand from clams and oysters, so I decided to try it on the cilantro one day and surprisingly - it worked. Not the same way it works on the seafood (they actually spit out the sand)