Start by soaking the cashew nuts, I forget to soak them ahead of time so always do a quick soak by adding the cashew nuts to my bullet blender, adding just enough hot water to cover the nuts, letting them soak for 15 minutes. In the meanwhile you can do the dishes or something else.
After the 15 minutes I add the remaining ingredients and blend it until smooth. I also add about 3 small splashes of hot water, one splash at the time until I reached my desired consistency. Keep it in your fridge, It should stay good for at least a week.
Enjoy!