Place salad greens in medium size bowl, and set aside.
To make Vegan Buttermilk Ranch Dressing, place cashews, soy milk, lemon juice, mustard, vinegar, and salt in a high powered blender, and process until smooth. Add the parsley and pulse a few times to combine.
Toss salad with desired amount of dressing, and refrigerate the remainder.
Top salad with toasted hazelnuts, and serve immediately.