Place the pork shoulder and the liquid in to the pressure cooker. Lock on the lid, set to high pressure, and place it over a medium flame.
Once pressure has been reached, allow the pork to cook for one hour before quick-releasing the pressure.
Allow the pork to cool a bit before shredding with forks or gloved hands. Season the pork with kosher salt.
Use a squirt bottle filled with the barbecue sauce to circle the perimeter of the plate.
Use a ring mold to in the center of the plate to construct a tower-- mashed potatoes on the bottom, followed by the collard greens and pork.
Remove the ring mold and marvel at the '90s presentation.