For the stew:, large aubergine, cut into 5 cm cubes, medium onions, peeled and quartered, swede, peeled and cut into 5 cm cubes, celery cut into 5 cm pieces, medium carrots, peeled and cut into 5 cm pieces, large leek, sliced into 5 cm pieces, red and 1 green pepper, cut into 5 cm squares, tomatoes, quartered, green beans, medium courgettes, sliced 2 cm thick, ras el hanout spice mix