Directions

1. Heat broiler, with rack set 4 inches from heat. Line a rimmed baking sheet with aluminum foil; set aside. Place spinach in a clean kitchen towel, and squeeze out as much liquid as possible.
2. In a medium bowl, combine spinach, parsley, cheese, capers, vinegar, garlic, and red-pepper flakes. Season with salt and pepper; toss to combine. Cut and open steak.
3. Cut several 12-inch pieces of kitchen twine; space evenly underneath steak. Spread spinach mixture down center of meat (see opposite). Roll steak over mixture, pressing firmly to compact the filling as much as possible; tie twine to secure roll. Cut roll in half crosswise. Place halves, seam side down, on prepared baking sheet; rub with oil, and season with salt and pepper.
4. Broil until browned, 8 to 10 minutes for medium-rare; let rest, loosely covered with foil, 10 minutes. Remove string, and slice steak into 1/2-inch rounds. Serve with White Bean and Tomato Saute if desired.