Preheat the oven to 180°C.
Cut each onion into 4 wedges. Drain the chickpeas.
Discard the outer, tough leaves of the cauliflower -set the tender ones aside.
Tear or cut the cauliflower into florets, then place them into a large baking dish. Arrange the onion and the tender leaves between the florets, then scatter the chickpeas around them.
Mix the oil with the spices, season with salt and pepper to your liking.
Drizzle the oil mixture over the veggies and toss well.
Bake for 35-45 minutes, until golden, stirring them a couple of times during thy cooking time.
Serve warm.