Pour the oil into the IP insert and press the Sauté button. Add the onions and saute until the onions become translucent and slightly browned. Add the garlic and cook for about 30-60 additional seconds.
Press the off button and add everything else to the onions. Stir and place the lid on the pot securely. Close the vent as well. Press the Manual button and adjust the time to 10 minutes.
When the cooking is done, do a quick release and remove the lid, opening away from you to avoid any steam burning your hand or arm.
Using a hand blender, blend the ingredients until smooth.
Season with a little salt and butter to your liking and serve.
Notes
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.