I don’t know if anyone here has ever eaten “Quorn”.
http://en.wikipedia.org/wiki/Quorn
The mycoprotein used to produce Quorn is extracted from the fungus Fusarium venenatum.
However, I think they are missing a bet, by trying to keep it as strictly vegetarian. That is, if you would *augment* a faux meat with *real* flavorings, it would taste a heck of a lot better. This could include putting in bullion or animal fats, that would seriously boost both its nutritional value and taste.
I hear they're sorta gamy.