Place 5-6 cups of water in a medium pot on the stove and place on medium-high heat.

Once water has come to a rolling boil, add potatoes and onions. Allow them to boil for about 20 minutes or until potatoes break fairly easily.

In a blender, (I use Vitamix), combine cashews, about 1/2 cup of your potato mixture, and 1/2 cup of water. Blend until creamy smooth, then pour into your potato/onion/water mixture.

Add remaining ingredients, and serve hot.