Place all the crust ingredients into a food processor and blitz until sticky paste forms. Transfer the crust into a cake tin or springform pan and press evenly to form the bottom layer. Place the tin in the freezer
Break the cauliflower into bite-size florets and place them on the tray along with drained chickpeas. Drizzle with olive oil and season to taste with sea salt and pepper—bake in the oven for 20 minutes.