To cook this picanha roast in the oven, let the meat rest at room temp for one hour so it will cook more evenly. Lightly trim off any visible skin or membrane from the bottom or sides.
Then, place the cut, fat side down, onto a rack of a roasting pan. Pat dry well with a paper towel, brush with olive oil, and season generously with coarse salt.
Pour just enough water in the bottom of the roasting pan to cover the bottom. It will prevent burning while the fat is dripping during the roasting process.