Chop the onions and garlic. This can be a pretty rough chop as we’re going to blend them later, so it doesn’t have to be super precise here.
Normally, I recommend either blending your soup in a good blender OR using an immersion blender. But for this particular recipe, I find that a good blender works best as it does a better job at making sure the cashews really get ground up in the mix. That being said, if all you have is an immersion blender, I would still make this soup because it’s still SO yummy. But I just wanted to note that a blender may be best here.