My local butcher sells a cut of beef oddly called Jew's Fillet. I think this is taken from the underside of the blade. It looks roughly like a pork tenderloin in size and shape. It has a sweet flavour and is densely textured. A lot of people round here pan sear it, slice it finely and serve it as carpaccio. I'm wondering whether to sous vide it and then slice into medalions and pan sear. I'm thinking about 55 C but for how long? Any ideas anyone?