Photo: Zangar (talk) (Transfered by Zangar/Original uploaded by Zangar) / Wikimedia Commons · CC BY-SA 3.0
The fish heads are left poking up through the crust on purpose, staring at the sky — that's literally where the pie gets its name.
Whole pilchards are arranged head-out around a pie filling of egg and potato, so their heads and tails break through the pastry lid as it bakes. It's traditionally served in the fishing village of Mousehole on Tom Bawcock's Eve, with slices sold to visitors who come for the festival.
Why it's made this way: Legend credits it to a fisherman, Tom Bawcock, who braved a storm to catch enough pilchards to save the village from famine — the exposed fish heads supposedly proved there was plenty of fish inside.