you need to cook it really, really hot.
http://en.wikipedia.org/wiki/Prions
"First of all, prions resist digestion in the gut. They remain intact proteins and are known to accumulate in the distal ileum. They resist digestion because they are extremely resistant to all forms of degradation. They also resist destruction by high-temperature autoclave and by formaldehyde, and in fact, by most means tested so far. In fact, cases of vCJD have been known to be contracted from properly sterilized surgical instruments."
http://en.wikipedia.org/wiki/Creutzfeldt-Jakob_disease
"In The Lancet (June 2006), a University College London team has suggested that it may take more than 50 years for vCJD to develop, from their studies of kuru, a similar disease in Papua New Guinea.1 The reasoning behind the claim is that kuru was transmitted through cannibalism in Papua New Guinea when relatives would eat their dead relative's brains as a sign of mourning. In the 1950's, the practice was banned, thereby preventing any further possible transmission. In the late 20th century, however, kuru has reached epidemic proportions in certain Papua New Guinean communities, therefore suggesting that vCJD may also have a similar incubation period of 30 to 50 years."
A while back I watched this thing on HBO where a female reporter went into a prison and interviewed a bunch of canibals I think it was like 10 or so and each one of them said basically people taste like a pork with an aftertaste, probably because of the food that we put into our bodies.
I say this cause I read a Maxim magizine where an artist made chese out of human breast milk and the said that the chese tasted horrible because the food we put into our bodies so I imagine that the meat would have the same effect.