Butterflying a steak is actually quite simple and can be done quickly at home, but you can also ask your butcher to do it.

　　

Ingredients

serves 4

　　2 packages (10 ounces each) frozen spinach, thawed

　　1/4 cup packed fresh flat-leaf parsley leaves, coarsely chopped

　　1/4 cup grated Asiago cheese (2 ounces)

　　2 tablespoons capers, drained and rinsed

　　2 tablespoons balsamic vinegar

　　1 garlic clove, minced

　　1/4 teaspoon crushed red-pepper flakes

　　Coarse salt and freshly ground pepper

　　1 pound flank steak

　　2 teaspoons olive oil

　　

Step 1

Heat broiler, with rack set 4 inches from heat source. Line a rimmed baking sheet with aluminum foil. Squeeze spinach in a clean kitchen towel (or a double layer of paper towels) to remove as much liquid as possible. Combine spinach, parsley, cheese, capers, vinegar, garlic, and red-pepper flakes in a bowl. Season with salt and pepper; toss to combine.

　　

Step 2

To butterfly steak, lay it on a cutting board with a short side facing you. Using a long knife, slice steak horizontally, leaving one side intact; open up like a book.

　　

Step 3

Cut several 12-inch pieces of kitchen twine; space evenly underneath steak. Spread spinach mixture down center of meat. Roll steak over mixture, pressing firmly to compact filling; tie twine to secure roll. Cut roll in half crosswise. Place halves, seam side down, on prepared baking sheet; rub with oil, dividing evenly, and season with salt and pepper.

　　

Step 4

Broil steak until browned on all sides, turning as needed with tongs, 8 to 10 minutes for medium-rare; let rest, covered loosely with aluminum foil, 10 minutes. Remove string; slice steak 1/2 inch thick.

　　Everyday Food: Fresh Flavor Fast by Martha Stewart Living Magazine. Copyright © 2010 by Martha Stewart Living Magazine. Published by the Crown Publishing Group. All Rights Reserved.Martha Stewart Living magazine was first published in 1990. Over the years, more than two dozen books have been published by the magazine’s editors.Martha Stewart is the author of dozens of best-selling books on cooking, entertaining, gardening, weddings, and decorating. She is the host of The Martha Stewart Show, the successful daily syndicated television show.