To make the cashew parmesan, combine all of the ingredients in a blender (I like to use a NutriBullet). Pulse until a coarse crumb forms.
In a large bowl, combine sliced mushrooms and parsley. In a measuring cup, whisk lemon juice, olive oil, and a sprinkle of salt & pepper. Pour dressing mixture into bowl with mushrooms and stir to combine. Sprinkle with cashew parmesan, serve and enjoy!
Notes
This recipe is best prepared and served the same day. If you would like to prep it up to 1 day in advance, wait to add the dressing until ready to serve.