dynasty warriors has been using chinese meat buns as a health pickup for years. pretty much the same thing.
people can interpret all sorts of things as racist, so be careful how you express why he's eating chilli;
if he eats chilli cus he's mexican and all mexans like chilli, then that's a stereotype which is a bit racist
if he eats chilli cus he likes it and/or it gives him some special power like fire breath or something then that's a character (ie an individual not a sterotype) and i'd have no problem with it