Line a cookie sheet with parchment paper and set aside.
In a large bowl, add cauliflower and chickpeas. Drizzle with olive oil, add crushed red pepper flakes, sea salt and pepper, stirring to coat. Spread evenly onto cookie sheet and place in the oven. Cook 20-30 minutes, tossing halfway through. Cook until lightly golden, but not burnt!
Meanwhile, whisk together lemon dijon dressing ingredients.
Drizzle over cooked cauliflower and chickpeas, add fresh parsley and mix to coat.