Cool grilled corn and then remove the kernels with a sharp knife, and transfer to a large mixing bowl.
Place the cauliflower florets in the bowl of a food processor and pulse about 25 times or until it resembles rice. Transfer to the mixing bowl.
Add the remaining vegetables and cilantro to the mixing bowl and toss well to combine.
Assemble the dressing by combining all ingredients in a measuring cup or small bowl and whisking well. Pour dressing over the vegetables and refrigerate for at least 30 minutes for flavors to combine.
Store any leftovers in a covered container in the refrigerator.