Plug in instant pot and press the sauté button. Once the IP heats up, add olive oil and onions and sauté for 2 minutes.
2 tablespoons olive oil, 1 onion
Add carrots and celery and sauté them for 2 minutes.
4 carrots, 2 stalks celery
Add broth, water, split peas, pork bone if using, smoked pork shoulder, sherry, wine, bay leaves, and salt. Seal IP, making sure that the pressure knob is in the sealed position .
4 cups beef broth, 2 cups water, 2 cups split peas, 1 ham bone, 2 cups smoked pork shoulder, 1/8 cup sherry, 1/8 cup white wine, 3/4 teaspoon salt, 2 bay leaves
Press the soup/stew button - it will default to 20 minutes on normal.
Once the timer beeps, you can either let the pressure release naturally for 15 minutes, or, if you're in a hurry like me, don an oven mitt and carefully tap the release valve, letting little sprays of steam out. After a minute of tapping, turn the pressure relief from sealed to venting.
Either transfer the pea soup to a soup tureen or ladle directly into some soup crocks.
Eat, smile, and enjoy.