Cut the beef into cubes and toss them in the ground cumin, ground cinnamon, ground ginger, ground coriander and paprika. Leave to the side whilst you prepare the rest of the ingredients.
Place the spice covered beef, sliced onions, crushed garlic and tomatoes into the tagine or casserole pot. Mix together well, put the lid on and place into the oven.
Cook for 1 hour. Then add the chickpeas and the prunes.
Cook for 1 further hour or until the beef is tender.
Remove from the oven and serve on couscous garnished with the coriander.
Notes
Use an oven proof casserole dish if you do not have a tagine.