Beef tenderloin is the leanest prime cut - and that leanness is both its virtue and its vulnerability. Massimo's solution on Top Chef ™ Season 22 was to cook the tenderloin fully submerged in herb-infused olive oil held at 160–165°F / 71–74°C. This is close to an olive oil confit but at a slightly higher temperature, working as both a cooking and seasoning mechanism simultaneously: the fat surrounds the meat on all sides throughout cooking, the aromatics season evenly, and the follow-up rest in warm clarified butter deepens the effect further. Massimo called this the 'osmosis effect' - as the beef releases moisture during cooking it absorbs the surrounding fat, transforming the texture of a naturally dry cut into something supple and rich. The key discipline is temperature control: the oil must never exceed 175°F / 80°C or the exterior will overcook before the centre reaches medium-rare.