Preheat the oven to 400 degrees F.

Place the oil and za'atar in a large bowl and whisk until mixed thoroughly

Add the cauliflower and toss to coat all the florets

Turn down the over to 375 degrees F.

Spoon the cauliflower mixture onto a large baking sheet and place in the oven for 15 minutes.

Turn the cauliflower over a with a spatula.

Roast for another 15-20 minutes until browned a little on the edges + tender.