• This barbecue pork shoulder with black beans, chimichurri and pupusas recipe uses masa harina. Mexican restaurants have been known to sell masa harina to home cooks. If you’re feeling particularly adventurous, why not research nixtamalising corn at home? A LITTLE HISTORY The word “barbecue” is derived from the Spanish word, barbacoa. There are differences across the USA and Mexico. We’re doing the American version, but most taquerías and street food vendors use braised meat. We’ve chosen to rub the pork with spices and added a bit of ginger, since pork works so well with it, using the shoulder on the…