Put everything in the Instant Pot in the order listed
Put the lid on the Instant Pot and twist into the locked position
Select MANUAL with HIGH pressure for 5 minutes
When the Instant Pot has finished cooking, manually release the pressure and open lid
Carefully lift the stainless steel insert out of the pot. Pour ingredients into a high speed blender. I like to use a very large stainless steel bowl and an immersion blender.
Blend at high speed until the sauce is really smooth and creamy. If sauce is too thick, thin it with a plant-based milk. As it cools the sauce will thicken so you may want to start out a little thinner