To start the cauliflower, preheat your oven to 450° degrees Fahrenheit. Remove the large florets from the cauliflower and cut them into even-sized pieces. Any of the very large florets can be sliced in half. Place the cauliflower into the dressing and toss to coat.
To roast the cauliflower, line a baking sheet with parchment paper or aluminum foil. Lay any flat pieces of cauliflower cut-side down, so they caramelize nicely. Roast for about 10 minutes before tossing. Return to the oven for about 3 or 4 minutes or until it is almost cooked through.
Once it is almost cooked through, grate some fresh parmesan cheese over top, if desired. Place back into the oven for another minute or so, just to melt the cheese.
Transfer to a serving dish and enjoy.