At medium-high temperature, preheat your stovetop grill (or preheat you grill at 400 degrees F if you're using a barbecue)
Add approxiately 1 tbsp of olive oil to you grill and reduce temperature to medium.
Add your vegetables: as you will likely need to grill in batches, cooking time will vary with each veggie. I therefore recommend checking them regularly and remove them as soon as they're tender and a little charred.
once the vegetables have cooled down, chop all the vegetables into sizeable chunks, and cut the kernels from the corn .
Transfer to a large bowl and dizzle with the vinaigrette.
Combine all ingredients and stir well. Can be kept in the rerigerator for several days.