Combine all of your ingredients in a large bowl except for the avocado and cashews. Toss to combine everything really well. You can do this step up to a day in advance. If you do, don't chop that avocado until you're ready to toss it in and serve (see step 2).
Refrigerate the slaw for at least 10 minutes before serving. Chop the avocado and toss it into the slaw, along with the cashews, just before you serve.
Video
Notes
The prep time in this recipe assumes that you take one of my favorite shortcuts: using bagged, shredded cabbage instead of shredding the cabbage by hand. You can start with a whole head of cabbage, but it will up the prep time considerably.