Ras el hanout is a Moroccan blend of spices often found in tagines, giving the dish an absolutely gorgeous flavour! It can be found in some large supermarkets or shops, or you can make your own (the blend contains cardamom, cinnamon, cloves, coriander, cumin, nutmeg, turmeric and ground black pepper). Merguez sausages can be found at some butchers or ordered online.