Arrange the florets on the baking sheet in a
single layer. Spray with a light coating of olive oil spray. This will help the cheese powder stick.
Sprinkle with salt, to taste (and remember to take into account how salty your cheese powder is) and then sprinkle with cheese powder.
Roast the cauliflower at 350 degrees 40 minutes, stirring the cauliflower about halfway through the cooking time. Test one. It should be folk-tender, but not mushy. It's fine if there's a little bit of bite, but it shouldn't be crunchy.
Increase the heat to 400 degrees and roast the cauliflower until it's lightly browned in spots, another 10 to 15 minutes. Stir, if needed, after 10 minutes. Or, if you like you can broil for just a minute or two.