Turn oven on grill mode at 220C.Cut aubergine, courgette and peppers into 2cm cubes. Place all vegetables in a large roasting pan.Drizzle vegetables with 30ml olive oil, season with salt and pepper, then toss well. Roast for 5-10min until vegetables are golden brown but still crunchy. Transfer to a large bowl. Cover with cling film and put them in the fridge to stay over night. Next day cut the bread into small cubes and roast in preheated oven to make crispy croutons.Put vegetables and croutons in salad bowl ,mix 90ml. olive oil and 30ml. balsamic vinegar and drizzle over them. Add and chopped basil and mix well. When serve sprinkle grated parmesan over.
Notes
You can add one chopped clove garlic when roast vegetables if you like .