In the same pan that was used for browning the meatballs, add additional evoo if needed, add onion and fennel, and sauté until they are caramelized and medium brown. Transfer sautéed onion and fennel to the tagine, casserole dish, or Dutch oven.
Add more evoo to the pan, if needed, and sauté carrots until they are browned. Add garlic and cook 2 minutes more. Transfer carrot mixture to the tagine.
Preheat oven to 350°F. Add raisins, chickpeas, tomatoes, broth, coriander, cumin, cinnamon, crushed red pepper, saffron, salt, and pepper to the tagine and cover. Place the tagine in the preheated oven and cook at 350°F for 1 hour until the meatballs are cooked through and the vegetables are soft.
Garnish with additional mint, parsley and cilantro. Serve with couscous.