Maybe try searing it on high heat until it gets brown and crispy-ish on the outside and then put it in the oven? Breading it might be another option, but in both cases you’re only going to get it semi-crispy on the outside - I think it has too much water content to crisp all the way through.
Edit: Haha, searched for “crispy cauliflower” and that’s what came up: https://minimalistbaker.com/quick-crispy-cauliflower/
Guess it’s time to display this in every classroom then: https://www.bible-tencommandments.com/10-C-Languages/10-C-Arabic.htm