Preheat oven to 180°C (160° C fan-forced).
Sprinkle a little sea salt on each chicken thigh and then coat with the ras el hanout.
Heat 2 tbsp of the olive oil in the casserole dish. Add the chicken thighs. If your dish isn't big enough to add them all at once, cook them in batches. Cook them until they're brown all over, remove from the dish and drain on baking paper.
There should still be some oil (and some juices from the chicken) in the bottom of the dish. If there's not enough, add the remaining oil, then the chopped onions, garlic, ginger and tumeric. Cook until fragrant, then add the chopped carrots and parsnips and the drained chickpeas. Stir everything together.
Add the cinnamon sticks, stock and water, then place the browned chicken thighs on top.
Bring it to a boil, then put the lid on the casserole dish, and transfer it to the oven.
Cook in the oven for 1 1/2 hours. By this time, the meat will be very tender.
Remove from the oven, stir in the honey and the pitted dates and garnish with coriander leaves.
Serve with couscous (prepared according to the packet instructions), rice or warmed pita bread.