It is a huge steak of Chianina beef that is cooked over hot charcoal . It is served very rare with the tagliata , sliced rare beef served on a bed of arugula , often with slices of parmesan cheese on top . â `` the `` date '' steak â `` T-bone steak of Chianina beef cooked over hot charcoal and served very rare with its more recently derived version , the tagliata , sliced rare beef served on a bed of arugula , often with slices of Parmesan cheese on top .