Long ago people used querns instead of mills for grinding wheat. Those querns were like round flags with a hole in the middle of each. They were usually made of cement or stone and were about five or six stone in weight.
Before the wheat was ground it was heated in a pit in order to make it soft. The quern was composed of two of these flagstones joined together and turned by a handle. The person who threw in the wheat between the stone had also to keep turning the handle until the wheat was ground.
When the wheat was ground in the querns it was then fit for use, To prepare the food it