Preheat oven to 375 F. Lightly grease a cast iron skillet.
Remove all the outer leaves of the cauliflower & rinse it inside and out. Pat it dry & set it down onto a tea towel to drain off water from the inside, while you prepare the seasoning.
In a small bowl, combine the seasoning, olive oil, minced garlic, & parmesan cheese. Mix well to combine.
Turn the head of cauliflower upside down & carefully cut off most of the thick stem. Make sure not to cut off the area where the florets’ stems attach.
Spread the seasoning mix all over the cauliflower starting with the underside. Make sure to get the seasoning on the inside, between the stems to season the inside of the cauliflower. Turn it over & cover the outside of the cauliflower head with seasoning.
Place seasoned cauliflower onto the prepared cast iron pan, stem side down & cover the pan & cauliflower with a sheet of aluminum foil tightly.
Place into the oven and let it cook about 30 minutes.
Take the aluminum foil off, raise the heat of the oven to 400 F. & place the pan with cauliflower back into the oven.
Bake uncovered for another 30 minutes. You can test if the cauliflower is done by inserting the fork and feel how easily it goes in.