Add all ingredients to the Instant Pot and stir.
Place lid on, make sure vent is closed, and hit the “manual” button. Increase time to 60 minutes.
Once done, let naturally release or press “cancel” and release the pressure.
Remove lid, shred with a fork, and hit the “sauté” button. Stir regularly as the juices reduce. This may take up to 20-30 minutes to fully reduce.