1. Place onion, bay leaves, 500ml juice and 250ml water in a pan.
2. Bring to the boil over medium-high heat, then simmer for 1 minute.
3. Add chickpeas, cumin and coriander, then cook for a further minute.
4. Add cauliflower, eggplant and olives, then cover and cook for 3 minutes.
5. Add zucchini and remaining 125ml juice, cover and cook for 2 minutes.
6. Add parsley, orange cubes and oil, then season with salt and pepper.
7. Remove from heat and stir.
8. Cover and stand for 2-3 minutes.
9. Serve with zest and extra parsley.