The oil is heated in a large saucepan. Cut the meat into cubes and fry with chopped onion. Add chopped garlic, cumin, leeks and saffron. Spices fry a few minutes with the meat. Add tomatoes with tomato sauce. Boil for about 40 minutes until the meat becomes tender. Add any water during cooking. Cous put up is prepared according to the description of the package. Zucchini and carrots cut into small cubes and add to the stew, with chickpeas, 10 minutes before the completion of the boiling. Season with salt and pepper. Raisins and parsley are added just before serving. Serve with couscous.