You will also need a 16½ x 12 in (42 x 30.5 cm) shallow roasting tray.

1. Pre-heat oven to its highest setting.
2. Prepare the courgettes and aubergine ahead of time by cutting them into 1 in (2.5 cm) dice, leaving the skins on. Now place them in a colander and mix them with one rounded dessertspoon of salt. Then place a plate on top of them and weigh it down with a heavy weight, making sure you have a plate underneath the colander to catch the drips. Leave them like this for an hour so that any bitter juices can drain out.
3. Meanwhile, pour boiling water over the tomatoes, leave them for one minute exactly, then drain, slip the skins off and quarter the flesh. When the aubergines and courgettes have drained, squeeze out any excess juice, then dry them thoroughly in a clean cloth. Pre-heat the oven to its highest setting.
4. Now arrange the tomatoes, aubergines, courgettes, peppers and onion on the roasting tray, sprinkle with the garlic, torn-up basil leaves, crushed coriander seeds and pepper. Drizzle the oil over, then mix thoroughly to get a good coating of oil. Roast on the highest shelf of the oven for 30-40 minutes, or until the vegetables are tender and tinged brown at the edges.
5. Serve straight away.