If you have an Instant Pot, put the raw potato, onion, carrots, red pepper garlic and cashews inside with 2 cups water. Cook on manual high pressure for 5 minutes. Allow the steam to release.
You can also put it all in a pot over the stove and cook covered for about 20 – 25 minutes.
When done, put the garlic and cashews into a blender.
Measure/weigh out the potato, onion, carrots and red pepper that is needed and put them in the blender.
Add the rest of the ingredients, including the ½ cup reserved liquid from cooking the veggies, and blend on high until creamy and smooth.
Serve! It thickens as it cools, and gets nice and thick in the fridge. It will thin out a bit once you warm it up again. You can put it in a pot and warm it up on the stove right after you make it to thicken it as well.
Notes
Since you are cooking the cashews with the veggies, there is no need to soak them. If you don’t have a high speed blender, it may take more time to achieve a really smooth consistency.
I cook 1 whole potato (245 g, red or Yukon gold is my favorite for this), ⅓ of an onion (95 g), 1 large carrot or 6 baby carrots (50 g), and ⅓ of a red pepper (58 g). Then measure out what I need from there. You will have left over but I’d rather have more than be short. The veggies weigh more after they are cooked because they absorb the water. The cashews weigh about 150 g after cooked.