Add leeks, cauliflower, garlic, chicken broth, and cinnamon to Instant Pot.** Season with salt and black pepper, to taste.
Add lid and lock into place. Switch vent to the “Sealing” position and set the “Manual” setting on high before adjusting the cooking time to 9 minutes. After a brief pause, the Instant Pot will automatically start building pressure.
When finished cooking, do a quick release (QR) to allow the pressure to escape. Unlock and carefully remove the lid.
Add goat cheese, cream cheese, and sharp cheddar to the container and stir until cheese is completely melted.
Blend mixture with an immersion blender until smooth (or transfer to blender or food processor if you don’t have an immersion blender). Taste and adjust seasonings, as desired.
To serve hot, transfer to individual serving bowls and top with crumbled bacon, green onions, and/or grated cheddar cheese.
To serve cold, transfer soup to an airtight container and store in the refrigerator until chilled. Serve as above. Enjoy!