Plug in the Instant Pot. Open it. Click the "Saute" button and let the instant pot warm up. Add oil, if desired Add the onion and garlic and let saute until softened, stirring frequently Click "Cancel" to stop the saute feature Add all of the other ingredients. Stir well. Close the lid. Turn the valve to "Sealed" Click "Manual" and reduce the time to 4 minutes Let the pressure naturally release once cooking is complete Remove the lid, stir well Puree the soup to your desired consistency, using caution, as it will be hot. I prefer to completely puree the soup - but you could do less to your taste Serve warm, with crusty (gluten free) bread, and a nice light salad