In a medium pot, bring about 3 cups of water to a boil. Place potatoes, carrots, and onion in the pot and allow to cook until veggies are tender--approximately 15 minutes.
When veggies are tender, drain and place them in a blender. NOTE: reserve 1 cup of the broth, and add to blender. Add all the remaining ingredients, and blend until smooth.
If your blender isn't jet engine speed, soaking the cashews in warm water for at least 30-minutes before adding to this recipe will help this recipe come out more creamy.
Now, it's ready to use in nacho cheese dip, mac-n-cheese, topping for steamed broccoli, or anything else you need a creamy, cheesy sauce in.
