Panna Cotta's need to be prepared a day in advance, the gelatine should set so the panna cotta is smooth and creamy. The sharp taste of the rhubarb is complemented by the delicate flavour of the panna cotta.
Prep: 15 minutes plus 30 minutes for the steak to marinate
Cook: 10 minutes
Prep: 30 minutes
Cook: 10 minutes
Prep: 15 minutes
Cook: 15-30 minutes (dependent on if you are preparing it as a starter or main dish and choice of cooking method)