Preheat the oven to 200°C, fan.
Slice the vegetables (aubergine and courgette 0.5 cm thick, peppers 1 cm thick, leave the cherry tomatoes whole) and arrange them on a sheet pan.
Drizzle the veggies evenly with the olive oil and sprinkle them with salt all over.
Roast in the oven for 40 mins. The vegetables should be browned and nicely caramelised. Don't worry if a few are slightly blackened, this will add more flavour.
Leave the vegetables to cool completely.
While the vegetables are cooling, prepare the salad dressing by mixing together all of the ingredients in a jar. Shake to mix well.
Place the roquette (arugula) in a large salad bowl or serving dish and arrange the cooled vegetables over it.
Drizzle with the Balsamic Vinaigrette and serve immediately.