Arrange the vegetables in a baking tray lined with waxed paper. Make a few holes in the vegetables with a knife to escape the steam.
Roast the vegetables in the oven at 220°C/430°F. After 30 minutes, take the tomatoes and peppers out of the oven. Transfer them to the container with a lid and cover the lid.
After the eggplants are roasted for an extra 15 minutes, remove them from the oven and set them aside to cool. In the meantime, you can peel the skins of other vegetables.
Chop the peeled vegetables, then transfer them to the mixing bowl.
Add the remaining ingredients to the bowl, then mix them well.
You can sprinkle chopped parsley on it before serving.