This is naturally a very light sauce and depending on a variety of factors it can become a little dry. My tip is to reserve some of the deliciously starchy pasta cooking water before draining your pasta. When you combine the sausage, broccolini and cheese with the pasta, add a little water and begin thoroughly stirring. The water will form an emulsion with the cheese and cooking oils. You can add a little more pasta water and cheese until you have the desired consistency.