Before starting this Roasted Lamb Shanks with a Macaroni and Cheese Gratin recipe, make sure you have organised all the necessary ingredients. Fill a saucepan with water and bring to a boil. Tip the macaroni pasta and cook for 3 minutes maximum. Drain the macaroni and transfer into a bowl filled with water and ice. Tip the crème fraîche in a large bowl and add half of the grated cheese. ...