Try this vegan cauliflower steak recipe by Rissa Miller. See:
https://youtu.be/RlzLmnvS-f8
Recipe at https://www.vrg.org/blog/2021/01/11/cauliflower-steaks/
More videos at:
https://www.youtube.com/channel/UCvSyCToa_i9fA4D5CLCAFWw
https://www.vrg.org/veg_videos.php