Scrub potatoes clean and roughly chop. (You can peel your potatoes if desired, but I don't mind the difference in color personally) Add to Instant Pot.
Slice leeks down the middle lengthwise and clean thoroughly. Slice into rough half moons shapes. Add white portions to Instant Pot. (Tip-freeze green portions for your next veggie broth!)
Roughly chop garlic, celery and sweet onion and add to Instant Pot.
Add cashews, broth, thyme and bay leaf. Mix to combine. Pressure cook for 6 minutes allowing a natural release.
Remove bay leaf and blend soup. Either with immersion blender or in a standing blender. (Allow soup to cool slightly and be careful if using standing blender as to avoid splashing)
Stir in baby greens or sliced lacinato kale or baby greens and allow to wilt.
Serve with some freshly cracked pepper and enjoy
Notes
*For a nut free version, leave out cashews! No replacement needed.