Some people like to serve this with cubes of feta or haloumi stirred in at the end so that they melt a bit. Risoni or orzo pasta is like a large grain of rice and you can use any small noodle instead, although the cooking time will probably vary. If you prefer, use one big piece of meat on the bone instead of cubes, and just break it up into portions for serving. The meat must be very soft, so cook it as long as it needs before adding the pasta to the casserole for the last 15 minutes.