What's a Choripan? Argentine Chorizo Sandwich. Who new this glorious food had its own day! A well deserved day I should add. I was introduced to choripan when I was in Buenos Aires, Argentina and OMG! You’ll find choripan carts at nearly every festival, market or fútbol game. It was love at first taste and please forget the Chimmichurri! Choripan, the most amazing street food on this planet! So how do you make a choripan? You will need Argentine style pork chorizos , grilled