@
Salfaro: Nice ideas to try to make that work, but I can't believe that will fly. He might have one or two tricks up in his sleeves, but even if he has a CocaCola/KFC-level secret recipe, when he is grilling it openly at a stall, it won't take a lot of time to reverse engineer a recipe, close enough to make it work. Short time profit, followed by their doom. Just like in RL.
And if he's trying to keep it a secret, that it is giba meat, they will accuse the tribes of hunting other prey.
I know they need money, but he should come up with some other unique recipe of for example a tasty japanese/western bread/roll. Working with that giba meat is just too dangerous.
I believe it's the next plot device though. "Oh no! What have I done? Now I somehow have to save them." Something along those lines.