Chicken and green olive tagine

This dish is slow cooked in a Dutch oven, but you could always use a tagine if you have one. Preserved lemons have a subtle and distinctive flavor and are available at specialty supermarkets. 4 tbsp olive oil 4 large tomatoes, roughly chopped 1 tbsp ground ginger juice of 1⁄2 lemon for the slow cooker 2 tbsp paprika (1 lemon for the traditional method) pinch of cayenne pepper 2 cups hot vegetable stock for the slow cooker 1 tsp ground turmeric (3 cups for the traditional method) salt and freshly ground black pepper about 3⁄4 cup green olives in brine, pitted 8 chicken drumsticks and rinsed 4 onions, roughly chopped 2 preserved lemons, halved, flesh discarded, 4 garlic cloves, finely chopped and rind shredded (optional) pinch of saffron threads handful of cilantro, chopped 1in (2.5cm) piece of fresh ginger, handful of flat-leaf parsley, chopped peeled and grated in the slow cooker PREP 20 MINS, COOK...