Philly Stuffed Flank Steak with Provolone Cheese Sauce
Author: 
Recipe type: Two-zone direct and indirect heat
Serves: 6 to 8
 
Cook's Note: I used two large skillets here. One for the onions and the second for the peppers and mushrooms to cook while the onions caramelize.
Ingredients
  • For the filling:
  • 2 medium yellow onions, thinly sliced
  • 4 medium bell peppers (mix and match to your taste, thinly sliced
  • 16 ounces sliced button mushrooms
  • 2 tablespoons unsalted butter
  • 2 tablespoons + 2 tablespoon neutral cooking oil
  • Kosher salt and freshly ground pepper
  •  :
  • For the steak:
  • 2- to 2½-pounds flank steak
  • 1½ teaspoons kosher salt
  • 1 teaspoon ground black pepper
  • ½ teaspoon granulated garlic
  •  :
  • For the cheese sauce:
  • 1 tablespoon unsalted butter
  • 1 tablespoon flour
  • 2 cups whole milk
  • 1½ cups grated provolone cheese
  • 1 teaspoon kosher salt
  • ¼ teaspoon dry mustard
  •  :
  • Extras: Butcher’s string
Instructions
  1. Caramelized onions: Melt butter in in a large skillet over medium-high heat. When the butter stop foaming, add the onions and saute until golden brown; about 15 to 20 minutes. Remove from pan and set aside to cool.
  2. Peppers: Add 2 tablespoons cooking oil to skillet preheated over high heat. Add sliced pepper and quickly saute for 1 minute; leave them crunchy. Season to taste with salt and pepper. Set aside to cool.
  3. Mushrooms: Add skillet back over medium-high heat and add remaining 2 tablespoons oil. Add sliced mushrooms. The mushrooms will release a lot of water. Keep cooking until the water has evaporated from the pan. Continue to saute until golden brown. Season to taste with salt and pepper. Set aside to cool.
  4. Assembly: With a sharp knife, butterfly open the flank steak. Place between two sheets of plastic wrap and pound to a uniform thickness on the thinner-side of ½-inch thick. Combine the salt pepper, and granulated garlic then season both sides of the meat using all of the spice mix. Position the meat so that the grain is running parallel to your body (this will ensure tender slices for serving). Layer the vegetables over the meat and and lightly press. Roll the meat away from you to form a thick roll (the grain of the meat should be running the length of the roll). Tie with butcher’s string at 2-inch intervals to secure.
  5. Cheese sauce: Melt the butter in a medium sauce pan over medium heat. Whisk in the flour and cook for 1 minute; whisking continually. Slowly whisk in the milk until smooth. Bring to a simmer and cook until thickened to the consistency of cream. Remove from heat and sir in grated cheese until melted and thoroughly combined. Sauce can be reheat over low heat.
  6. Set up grill for two-zone cooking with direct high heat and indirect heat; brush and oil grates before grilling. Place a drip pan under the grates on the indirect side.
  7. Over direct heat, starting seam-side down, sear the meat well on all sides. Move to the indirect side of the grill over the drip pan. Close the grill cover and continue cooking for 15 to 20 minutes or until the internal temperature reaches 125°F to 130°F. This dish is best if not cooked beyond medium. Remove from grill and let rest for 10 minutes before slicing. Slice into 1-inch rounds and removing the strings as you go. Serve hot or at room temperature. This makes for an impressive buffet dish with a little cheese on the side!
  8. Indoor Cooking: Assemble as directed. Preheat the oven to 350°F. Heat an oven-proof grill pan or large skillet over medium-high heat. Brush pan with oil and place the steak roll in seam-side down and sear on all sides. Transfer to the oven and bake until until the internal temperature reaches 125°F to 130°F. Finish as directed.
Recipe by Grilling Outdoor Recipes powered by Bull Outdoor Products at http://www.grillingoutdoorrecipes.com/all-the-best-parts-of-a-philly-cheese-steak-rolled-up/