The Ga word for Ga Kenkey is Otim. Before Gordon Guggisberg became Governor of the Gold Coast, the grain (corn) used to make Otim was ground between stones (stone mill).
It was Guggisberg who introduced the use of the corn mill.
So Ga people started making Kenkey from corn ground not with stone mill but by the new machine (corn mill). People had difficulty with the new machine.
Kenkey is mostly served with fish and Shitor
So if you were asked by your parents to go buy Kenkey, they will ascertain from you whether the Kenkey you went to buy was made from the stone mill or from the machine (corn mill).
A group of people eating Kenkey during the annual Kenkey Festival in Accra
So the name corn mill became associated with Kenkey and thus corn mill, corn mill, corn mill became adulterated and thus Kenkey transformed from otim to "komi"
That explains "Otimshinu", right?