Has anyone heard of a beefsteak mushroom, they are a dark red in color and very delectable?

Beefsteak Mushrooms are what they call Gyromitra esculenta.
These contain MMH (rocket fuel), which accumulates in your
body and can eventually kill you.

Go here for more information:

http://botit.botany.wisc.edu/toms_fungi/may2002.html

and here:

http://mushroomexpert.com/toxicity.html

(Read the section on gyromitrin)

-- Feral Boy