Oh, Mexican Street Corn, where have you been all my life? You know those formulaic (and perhaps pretentious) blogs resembling something out of a J Peterman catalogue? Sure you do. The blogs where someone in Etherland tells us about the first time he/she sampled (type of food) while traveling in  (exotic land) wearing a  (bikini, kaftan, sheepskin thong, whatever)  as he/she cruised down the (faraway river).   (Guilty!) This is not one of those blogs. I did not buy street corn skewered by a stick from a vendor on my last visit to Mexico. I did, however, bury my teeth in a roasted cob of corn, so crunchy + sweet, and I…