Create the perfect crust
After much experimentation, I’ve concluded that grilling pork tenderloin in a covered gas grill solves the problem. (I rarely go to the trouble to light a charcoal fire for two pork tenderloins, but you can of course use this method with charcoal; see the Grilled Pork Tenderloin recipe for details) A gas grill heated to high with the lid down can effectively cook a pork tenderloin directly (like a steak) and indirectly (like a roast) simultaneously.
The key with this method is to get this sear and cook the pork tenderloin as quickly as possible, before it has a change to dry out. To develop an impressive crust (and to keep the grill from losing heat), I’ve developed the "7-6-5" method for timing the pork