Oven-Baked Pork Tenderloin with Potatoes

Season the piece of meat with salt and pepper, insert a sprig of rosemary, and place it in a baking dish with oil. Sear on the stovetop until a nice golden crust forms. Add the potatoes, a little more oil, season with salt, and bake at high heat for 20 minutes. Lower the oven temperature and continue cooking for about an hour and a half.