Cook the Onion: Add 1 tablespoon olive oil to an electric pressure cooker. Turn to sauté, then add the onion and ¼ teaspoon of salt, cooking for 7 minutes and stirring occasionally.
Add the Aromatics: Add the pepper, turmeric, and garlic,, stirring until fragrant, about 30 seconds. Turn off the sauté setting.
Add the Vegetables: Add the celery, potatoes, cauliflower, and ¾ teaspoon of salt, stirring to combine.
Add the Stock and Chicken: Add the chicken stock and chicken, stirring until well combined.
Pressure Cook: Secure the lid, select the manual setting, and set to high pressure for 20 minutes.
Release the Pressure: When the timer is done, quick release the pressure and carefully remove the lid.
Shred the Chicken: Remove the chicken and shred or chop into bite-sized pieces. Add back to the pressure cooker.
Finish and Serve: Stir in the lemon juice, coconut milk and ½ teaspoon of salt. Taste, adding additional salt, pepper, or lemon juice if desired