1.Preheat oven to 220°C. Line an oven tray with baking paper.
2.Combine oil, cumin, seeds and honey in a large bowl; season. Add cauliflower and sprouts; toss to combine. Place vegetable mixture on tray.
3.Bake for 15 minutes or until vegetables are almost tender. Add nuts to tray; bake for a further 5 minutes or until nuts are golden and vegetables are tender.
4.Meanwhile, make tahini dressing: Combine ingredients in a small bowl; season to taste.
5.Serve vegetables topped with herbs and drizzled with tahini dressing.
Nigella seeds, also known as kolonji, are the seeds sprinkled on Turkish bread. They are available from delis and greengrocers that stock spices, otherwise substitute cumin seeds. Before using tahini always stir the oil that sits on top of the paste back into it and ensure that any liquid that is added to thin tahini is cold and not hot, otherwise it will have the opposite effect and thicken the tahini.