How do you cook in this game?

I added water to flour and got dough.

I added fish to dough and got a ball of dough with a fish in it.

As I understand it I'm supposed to be able to cook this to make a pie, but where? I tried putting it in the fireplaces in the houses but it won't go in there.

Am I missing some other ingredient? Do I need a pie pan or something?

Seriously I was trying to cook this pie for over an hour last night. What am I missing?

THANKS!