Step 1 For the sauce, place all the ingredients in a saucepan. Bring to a simmer over low heat. Gently simmer, stirring constantly, for 10 minutes until sauce thickens slightly (be careful not to let the sauce burn).
Step 2 Meanwhile, heat the pork following the packet directions.
Step 3 Preheat a grill on medium. Place the corn chips on a large baking tray. Sprinkle with the pork and cheddar. Grill for 5 minutes or until the cheese melts.
Step 4 Drizzle with a little barbecue sauce and sprinkle with the shallot and fresh and pickled jalapeño. Top with a dollop of sour cream and scatter with coriander. Serve with the remaining barbecue sauce on the side.