1.To make cheesy polenta, combine the water and milk in a large saucepan; bring to the boil. Gradually add polenta, stirring constantly. Reduce heat; cook, Stirring, for about 5 minutes or until polenta thickens. Stir in cheese and butter. Season to taste with salt and pepper.
2.Meanwhile, place steaks on a board. Secure one piece of prosciutto and one sage leaf to each steak using a small skewer or toothpick.
3.Melt butter and oil in a large frying pan, cook lamb, in batches, until browned on both sides and cooked as desired. Cover to keep warm.
4.Divide the polenta and lamb among serving plates; serve with rocket.
Not suitable to freeze or microwave.Note