Step 1

Season both sides of the roast evenly with kosher salt. Place on a rimmed sheet pan.

Step 2

Transfer to the oven and cook until very tender, 27 hours.

Step 3

Remove the roast from the oven and pat dry. Coat all sides with the pepper.

Step 4

Heat a large cast iron skillet over medium-high heat for 5 minutes. Add the oil and, when it begins to smoke, add the roast. Sear until golden brown on all sides, 3 to 5 minutes total. Transfer to a cutting board.

Step 5

Let rest for 5 minutes. Slice across the grain and serve.