Cut pork butt into three equal sized pieces and place into the Instant Pot. Add onions.
In a small bowl mix coconut aminos, broth, honey, fish sauce, garlic, and ginger, until well combined. Pour mixture over pork.
Close lid and seal vent. Press manual and adjust time to 90 minutes with the +- buttons.. Allow pressure to release naturally when finished. Remove pork from Instant Pot and place in a large dish. Discard bones (or save them for broth) and shred the pork with two forks or claws.
Serve warm. Top with cooking liquid if desired.
If you want a thicker sauce boil down the cooking liquids on saute or make a slurry with arrowroot starch.
Recipe by Food and Sunshine at http://www.foodandsunshine.com/pressure-cooker-asian-pork-aip-paleo/