Prepare and preheat your grill to high heat. Spray the corn on the cob and grill for a few minutes on each side until charred and done—a total of around 8 minutes. Lightly salt and pepper.
When the corn is cool enough to handle, slice the kernels off the cob and place into a large bowl; put in fridge to cool.
Layer all the prepared veggies in a glass bowl (except the avocado).
Add avocado before serving. Garnish with fresh basil.
Pour dressing over veggies and toss to combine, or serve dressing on the side.
Serve immediately. Enjoy!