Cut the cauliflower into small pieces and fry until golden.Add the cream and gently simmer for 5 - 10 mins or until tender.
Blitz until smooth and season to taste. Put to the side.
In a pan, melt the butter until foaming then add the hazelnuts - set to the side in a bowl.
In a heavy non-stick frying pan, heat to smoking.Season the steaks with some olive oil and salt and pepper. Place into the pan and fry for approx. 2 - 3 mins each side.Add a knob of butter and baste the steaks.Rest for 10 mins.
To plate up, spoon the cauliflower purée into the middle of the plate, followed by the steak (sliced against the grain) and a drizzle of the hazelnuts and butter.Scatter some parsley over top.