How to Make It
Heat grill to medium-high. Once it is hot, clean the grill grate with a wire brush. Just before grilling, oil the grill grate.
Mix together the oil, parsley, capers, vinegar, garlic, 1 teaspoon salt, and ¼ teaspoon pepper in a medium bowl.
\Season the steaks with 2 teaspoons salt and ½ teaspoon pepper. Grill, until an instant-read thermometer inserted in the center registers 140° F, 5 to 7 minutes per side for medium-rare. Let rest at least 5 minutes before slicing. Serve with the caper sauce.