Add the lamb to a casserole and cook over high heat
When browned, remove from the heat and set aside
Keep a tablespoon of fat in the casserole and discard the rest
Reduce to medium heat then add the garlic, onion and spinach and cook until the onion is translucent and the spinach wilted or about 5 minutes
Return the lamb to the casserole with the onion-spinach mixture, add the tomato puree, cumin, harissa, chicken, chickpeas, lemon juice, salt and pepper in the pan
Simmer over low heat for about 20 minutes
Add the pasta and cook for 15 minutes or until pasta is cooked
