Soak cashews overnight -OR- do a QUICK SOAK METHOD: In a small pot, bring water and cashews to a boil with a lid. Turn the stove off and let sit for at least 10 minutes. If using a high speed blender, 10 minutes is sufficient–if not, then let sit for closer to 20 minutes.Rinse well
Over medium heat, add oil, onions and a pinch of salt. Sautee onion until pieces develop a deep caramelization. DO NOT BURN! Adjust your heat down if you notice the pieces browning too fast.
In a blender, add all ingredients except the caramelized onions. Blend until a silky smooth consistency is obtained--stopping and scraping down the sides if necessary.
Add your caramelized onions and cashew onion sauce in to your serving bowl. Mix well. Refrigerate for at least 2 hours. Tastes BEST when flavors get to merry overnight in the frig.
Notes
30 minute prep time includes using the Quick Soak Method BEST SERVED AFTER OVERNIGHT REFRIGERATION but can be served after 2 hour refrigeration.