Flip Food Frequently p48

The
more often you flip the food, the less time it
spends against the griddle, and the less time the
heat has to build up below the surface of the food.
The result is that the overcooked layer is minimized,
and more of the center is done just right.

In essence, constant flipping reduces the size of
the swings that the surface temperature takes as
the food surface alternates between cooking and
cooling. It also lowers the average temperature of
the surface, which means that, edge to edge, the
food ends up more evenly cooked.

Repeated flipping also speeds the cooking a bit
because, in much the same way that it minimizes
how much excessive heat builds up on the cooking
side, it also reduces the amount of cooling that
occurs on the resting side.

FLIP -  every 15-30 seconds..