From the pages of Make's Hallowe'en issue, Andy Oakland's simple and clever recipe for making a meat-head, sure to be the smash hit at your fete (this was first seen here on BB in 2001!). For the veggies, I imagine you could make a soy-meat-head, but be sure to clearly label them.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.