Place the onion, garlic, oregano, bay leaves, salt, pepper, water, and pork in the instant pot.
Cover with the lid and close.
Move valve to SEALING.
Press the MEAT/ STEW button.
Make sure the timer is set for 45 minutes, or press the PRESSURE COOK button and adjust time to 45 minutes.
Let the instant pot complete its full cycle.
Once it's done, release the pressure by moving the valve to VENTING.
Remove the lid.
With a spoon, remove as much of the fat on the top layer of the broth as possible.
Add the hominy and salsa verde.
Press Pressure Cook. Cook for 10 minutes without the lid.
Serve with your favorite toppings and enjoy!