Preheat oven to 450 degrees Fahrenheit.
Peel parsnip and cut into thirds. Parsnips have a woody core, so cut around core and discard.
Cut into fry size pieces and add onto a baking sheet.
Drizzle with olive oil and line parsnips on a baking sheet into rows. Roast for 15 minutes, flipping once.
Meanwhile, in a blender, add cashews, water, coconut milk, mustard, minced garlic and salt. Blend until smooth. Add sauce into bowl.
Top parsnip fries and sauce with parsley and enjoy!