Preheat your oven to 350°F.
Season the lamb shanks with sea salt and freshly ground black pepper.
In a large ovenproof pot, heat the olive oil over medium-high heat.
Add the lamb shanks and brown them on all sides. This should take about 10 minutes.
Remove the lamb shanks and set them aside.
In the same pot, add the onions and garlic, cooking until softened. This takes around 5 minutes.
Add the ground coriander, cumin, and cinnamon. Cook for another 2 minutes until fragrant.
Pour in the tomatoes, chicken broth, and red wine.
Return the lamb shanks to the pot and add the raisins and dried red chilies.
Bring the mixture to a boil, then cover the pot and transfer it to the oven.
Cook for about 2 hours, or until the lamb is very tender.