Preheat the oven to 450°F.
Place the cauliflower head down on a chopping board and carefully cut into about ¾" thick steaks through the stem. Reserve any loose florets for later use. Season with salt and pepper.
Heat 1tbsp oil in a large skillet on medium-high heat. Place the steak on the pan and cook for 2~3 minutes per side until lightly golden.
In the meantime, combine the remaining 2tbsp oil with red chili powder, crumbled kasoori methi, ground cumin and turmeric.
Transfer the par cooked cauliflower steaks on to a baking sheet and brush or spoon on the spicy oil. Roast for about 20~25 minutes or until tender. Serve right away over brown rice or quinoa.