Cut the cauliflower into bite sized florets, then place them into a small baking dish. Spray the cauliflower with olive oil cooking spray
Bake the cauliflower at 400 degrees for 10 minutes
While the cauliflower is baking, make the cheese sauce.
Add the garlic powder, onion powder, basil, oregano, paprika, salt, milk, cornstarch, and 2 cups of the cheddar cheese to a medium sized saucepan (you will use all of the cheddar in the sauce, except for ½ cup saved for the top of the dish)
Cook the cheese sauce over medium heat for 5 - 10 minutes, whisking or stirring often, until thickened
After the cauliflower has cooked for 10 minutes, remove it from the oven and pour the cheese sauce over the top.
Sprinkle the remaining ½ cup of cheddar and ½ cup of mozzarella cheese over the top of the cauliflower
Bake the cheesy cauliflower at 400 degrees for 20 - 25 minutes or until the cheese starts to brown on top and is bubbly