Preheat oven to 190 C (375 F) and line 2 baking trays with parchment paper
Add rinsed chickpeas to a bowl and season with oil and spices
Add sweet potato and chickpeas to one sheet and broccoli and pepper to another. Drizzle with oil and sprinkle with salt and pepper
Bake for 20-25 mins rotating the pans once near halfway. Set aside
While vegetables are roasting, prepare dressing by adding hummus, garlic, dill and lemon juice to a bowl and whisk to combine. Add enough water to thin until pourable. Set aside
To serve, you can divide to different plates or serve in a large bowl and pour dressing ontop