Slice the avocado in half and remove the pit. Cut into bite-sized pieces and scoop into a large mixing bowl.
Slice the cucumber lengthwise down the middle. Then cut into three equal, long strips. From there, chop the cucumber into cubes and add it to the mixing bowl.
Add quinoa and onion, and set aside.
Add water, cashews, herbs, spinach, scallions, lime juice and soy sauce to a high-powered blender. Blend on high until smooth and creamy. Taste and season with salt and pepper if desired.
Pour about 1/2 - 3/4 of the dressing over the mixing bowl and toss to combine. If you want more dressing, go for it and add the rest!