Cumin roast veg with tahini dressing

Name: Cumin roast veg with tahini dressing
Ingredients: 3 large carrots roughly chopped; 3 peeled raw beetroots roughly chopped; 1 sweet potato sliced; 3 red onions cut into wedges; 250g cauliflower florets; 1 tsp cumin seeds; 2 tbsp rapeseed oil; 1 tbsp balsamic vinegar; 2-3 tbsp chopped mint; 2-3 tbsp chopped coriander; 400g can chickpeas; 2 hard-boiled eggs halved; 100g young spinach leaves; 3 tbsp tahini; 1 tbsp crunchy peanut butter; 1 lemon zested and juiced; 1 tsp ground coriander; 1 garlic clove finely grated