To make the sauce, heat a medium-large pot over medium-low heat. Once hot, add the onion and sweat for 5 to 10 minutes, or until cooked through and translucent — adding a bit of water (or stock) as needed, to ensure the onions do not take on any color and/or burn.
In the meantime, in a high speed blender, add the stock, cashews, turmeric and nutritional yeast and blend until smooth. Depending on how yellow you want the sauce to be, add a bit more turmeric, if desired.
Once the onions are soft, add the cauliflower to the pot, followed by the liquid mixture. The cauliflower should just barely be covered by the liquid. If needed, add a touch more liquid, to just cover.
Bring the soup to a simmer, then reduce the heat and cover the pot. Cook for 20 to 25 minutes, or until the cauliflower has just cooked through.
Once done, carefully transfer the soup to a blender and blend until smooth. You may need to do this in batches.
Lastly, taste for seasoning, adding salt and white pepper as desired.
To turn this sauce into a soup, simply add more liquid sauce until you reach the desired soup-like consistency.
*Note: Add a bit more nutritional yeast and a bit of paprika (mostly for color) and this makes for a delicious 'cheese' sauce. This sauce also goes particularly well with this
Energy Bowl.