I would definitely eat my ass. 1, because I could say I just ate my ass, and B because it is pretty meaty and has a lot of protein I bet. Now other than my ass I would probably eat either my stomach. That'd be pretty ironic wouldn't it? Just so you know, it would be, ok?
If I had access to a surgical facility, then I'd definately go with my spleen. Don't need it to live anyways...it's just a nice, juicy piece of tissue just waiting to be basted with BBQ sauce and smoked slowly over apple wood coals.
at .22 pounds, it doesn't quite make the weight requirement...so I'm going to throw in a side of kidney (since only one is really needed)...that adds .4 pounds...and takes me over the .5lb limit. I'm thinking it has to be rinsed really well, and would require a really robust and aromatic marinade to hide any traces of 'urine smell'.
Kidney and spleen: a nice, Atkins-friendly meal that won't kill you.