Preheat oven to 160°C. Drizzle a large metal baking tray with a tablespoon of olive oil.
Place the cauliflower on a chopping board, resting on the stalk. Holding the head gently, slice the cauliflower into 5-6 thick slices (each about 1 inch wide).
Place the cauliflower slices gently on the prepared tray. Sprinkle with salt and pepper. Drizzle the top with remaining olive oil. Roast in the pre-heated oven for 30 minutes.
Increase oven temperature to 200°C (if your oven has a grill setting, turn it on). Roast for a further 15-20 minutes at this higher temperature till the cauliflower is starting to char and brown nicely. Remove from the oven and set aside.
Add ingredients for the Romesco sauce (red pepper down to Monini Classico in ingredient list) to the bowl of a small food processor and process to a chunky sauce consistency.
Spread Romesco Sauce on the base a large, shallow serving plate. Place the cauliflower steaks on top of the sauce. Sprinkle pomegranate seeds, parsley and parmesan. Drizzle with extra olive oil and serve immediately.