For the griddled beef, rub the beef all over with olive oil and season with salt and freshly ground black pepper.
Heat a griddle pan until hot and cook the beef for 3-4 minutes on each side, or until cooked to your liking. Set aside and leave to rest.
For the blue cheese butter, place all the blue cheese butter ingredients into a bowl and roughly mash with a fork until combined.
For the sautéed mushrooms and cabbage, heat the oil and butter in a pan and gently fry the cabbage and mushroom pieces for 5-6 minutes, or until tender.
To serve, place the cabbage and mushrooms onto a plate and top with the beef and a spoonful of the blue cheese butter. Drizzle over any meat juices from the pan.