In a frying pan, heat olive oil and add chicken breasts.
Cook till chicken breasts become crispy and browned. Cut them in fine pieces.
Meanwhile, add the same oil, onions, garlic and celery in the inner pot of instant pot. Select “Sauté”.
Then, add all other ingredients except all-purpose flour and lemon juice.
Close the lid and press the “Manual” button.
Cook for about 10 minutes on HIGH pressure and release the pressure naturally through the steam vent.
Open the lid and add whisked lemon juice and all-purpose flour mixture.
Cook uncovered till the soup becomes thick and dish out.
Serve and enjoy!