How do I cook roasts?

Steam's holiday sale added the "Holiday Dinner" achievement to Psychonauts. The description is:

Cook and consume two different kinds of roast in one sitting.

I played through about half the game previously before getting distracted, and remember nothing about cooking roasts. Where do I go to cook a roast, and how do I do it?


Solution 1:

  1. Use Pyrokinesis on a Squirrel to make a Squirrel Roast.
  2. Use Pyrokinesis on a bird to make your second roast.

Roasts are eaten right when they are picked up. Both animals must be eaten in the same area, without transitioning.