Set the Instant Pot to the sauté setting. Heat the oil until it shimmers.
Add the onion, carrots, celery, garlic, oregano, thyme, and pepper. Sauté for 3 minutes, stirring occasionally.
Add the broth and chicken. Lock the lid in place and set the steam release handle to "sealing." Select the soup setting and set the timer for 10 minutes.
When the timer beeps, allow the pressure to naturally release for 10 minutes, then manually release the remaining pressure.
Remove the lid and stir in the peas and parsley. Taste and adjust for seasoning.
Interesting Facts
Instant Pot chicken soup is a great way to use up leftover cooked chicken.
Adding frozen peas to the soup at the end of cooking helps to cool it down quickly.
This soup freezes well, so you can enjoy it even when you don't have time to cook.