Place the inner pot in the Power Cooker. Add all the ingredients except BBQ Sauce and Hamburger rolls.
Place the lid on the Power Cooker, lock the lid and switch the pressure release valve to closed.
Press the SLOW COOK button and increase the TIME ADJUSTMENT button to 10 hours.
Once the timer reaches 0, the cooker will automatically switch to KEEP WARM. Switch the pressure release valve to open. When the steam is completely released, remove the lid.
Remove the pork, shred with a fork, and add the BBQ sauce.
In a small bowl, thoroughly blend together the garlic powder, onion powder, cuMin and coriander to create a seasoning blend.
Cut the racks in half so that they can easily fit in the Power Cooker. Season them evenly with the seasoning blend.
Place 1 cup of water in the Power Cooker. Add the Ribs side by side. Add the diced onion and evenly pour the BBQ sauce over the ribs.
Place the lid on the Power Cooker, lock the lid and switch the pressure release valve to closed.
Press the SOUP/STEW button and then press the COOK TIME SELECTOR button until the time is 30 Min.
Once the timer reaches 0, the cooker will automatically switchto KEEP WARM. Switch the pressure release valve to open. When the steam is completely released, remove the lid. Optional: Have your broiler preheated to high. Place the ribs in a single layer on a tinfoil lined Baking sheet and broil the ribs on each side until browned well, about 5 minutes per side.
Brush the ribs with the barbecue sauce from the pot.