Preheat your oven to 450 degrees f. and line 2 large sheet pans with parchment paper.
Slice both of your cauliflower into 1-inch slices and arrange them onto the prepared sheet pans as shown. Add in any broken bits too.
Sprinkle with all of the seasonings and drizzle with the oil. Use your clean handsto rub in the seasonings and oil on all sides.
Roast for around 25 minutes, flipping halfway.
Meanwhile, in a small bowl, whisk together well all the bang bang sauce ingredients.
Transfer your sauce to a small ziplock bag or piping bag and refrigerate until ready to use.
Once your cauliflower steaks are finished roasting, carefully transfer them to a large platter.
Cut just a tiny corner from the corner of your bang bang sauce ziplock bag. Alternatively, you may simply drizzle using a spoon.
Pipe the sauce all over your cauliflower steaks, then sprinkle with parsley.
Enjoy while hot!