Grimrock

Hi!

Anybody found the pie? Hints please?

I'm running out of food, but I really want to find it, before I leave the island...

Hi!

There is a small area with a switch, and teleport on the southern part of the cemetery, but I can't get in.
I already finished the main game, just looking for unexplored parts on the map, and I found this.

Hints please ?