1. Preheat oven to 200c.
2. Place the chopped sweet potatoes & cauliflower on a baking tray, and toss with olive oil, salt and spices. Spread into a single layer and roast in the oven for 20 mins. While these are roasting, tip the drained chickpeas into a bowl and add the red onion. Toss with olive oil, salt & give it a good stir. After 20 mins add the chickpea mixture to the baking tray and cook for a further 10-15 mins until crispy and golden.
3. For the hummus, blitz everything in a food processor until gorgeous and creamy.
4. To make the dressing: in a small bowl mix together tahini, garlic, lemon juice, water and salt until well combined and creamy. Set aside.
5. Spoon the hummus onto a plate, top with the roasted vegetables, and sprinkle with mint, dill and drizzle with the tahini sauce.