Hey, if the dwarf meat is already roasted, it would be a shame to waste it.
And this from a player of dwarfs. When entering the village and being ambushed by goblins, one of them comments that, "We should get a few cuts from you". I looked at the avatar and thought, "yeah, you're probably right".
Slightly more seriously, this raises that long-debated question over what constitutes cannibalism in a fantasy world where there are many intelligent species (okay they call them races, but that's semantics). The actual definition is that you eat a member of your own species, but in FRPGs things tend to get more blurred so that, for example, a dwarf eating a halfling is liable to be viewed as a 'cannibal'.
If the half-orc eats the half-elf, is that quarter-cannibalism?