Cheers. Not sure about what makes it south Indian, but I'd guess the coconut, chutney and the heat in the dish might be something to do with it, but you'd need to ask the chefs. We have both Indian and Pakistani run TA's and restaurants, boy do those guys not like each other! The difference in the base gravy is evident in the finished dish. Its usually the non Indian TA's that tikka ALL their chicken too, I say non Indian because we also have a Turkish run TA, which was good while the Bangladeshi chef worked there, but turned to shit when they decided they could run the show themselves. I'll post the recipe and you can decide for yourself, but that's not to say this clone isn't missing ingredients that would be in genuine south Indian chilli chicken. The recipe is from a Bangladeshi chef who works in a Glasgow TA, I'm told. So....where should I post it?