Preheat oven to 425 degrees F and line a sheet pan with parchment paper or a silpat liner, set aside.

Remove green leaves from your head of cauliflower.

Turn your cauliflower stem side up and cut out as many 1-inch thick "steaks" as you can from your head. The end pieces usually fall apart so the best cuts from the middle.

Gently lay your "steaks" on the prepared sheet pan.

In a small bowl mix together olive oil, Cajun seasoning, and kosher salt. Remember to taste your Cajun seasoning first to know if you need to add less salt and to test its spiciness.

Brush on oil/seasoning mix making sure to coat the whole cauliflower steak. Make sure you gently flip the steak to coat so it doesn't fall apart.

Add to your pre-heated oven and cook for about 10 minutes or until it starts to slightly soften.

Remove from the oven, flip and cook for about 5 minutes.

Remove, sprinkle the tops of the steaks equally with Parmesan cheese. Add back to the oven and cook for another 5 minutes or until soft.

Sprinkle with parsley if desired.