This brothy stew is boldly flavored with a blend of characteristic Middle Eastern spices and finished with fresh spinach and fiber-rich chickpeas. Economical lamb shoulder tenderizes beautifully when leisurely cooked in a slow cooker. If you can't find boneless shoulder stew meat, do not substitute more-expensive lamb leg--it tends to dry out during slow cooking. Instead, purchase lamb shoulder chops and debone them. Serve over bulgur and accompany with a salad.