Bring a large pot of water to a boil. While you are waiting for it to boil cut the two heads of broccoli into small bite sized florets
Once the water is boiling, add in the broccoli and leave to cook for exactly 1 minute (not longer, you don't want them to be mushy!). After 1 minute remove the broccoli and place them in a bowl filled with ice and water. Once the broccoli is cool drain and place in a large bowl.
In a blender or nutribullet container combine all of the ingredients for the dressing and blend until completely smooth
In a bowl combine the broccoli florets, cashews, scallions, sesame seeds and toss in the dressing. Serve!