Pick corn. Remove from cob. Dry thoroughly. Grind into a coarse powder, sometimes called corn meal.
My dad, growing up on a very small farm, ate a dish he called corn meal mush -- corn meal cooked in water and butter, I believe. He disliked it, regarding it as barely above a Dickensian gruel served to prisoners or orphans. Among our contemporary friends, it's called polenta and is considered something of a delicacy.
The world is so full of a number of things.