Instructions

1. 1

   Prepare the Steak: Season the 1 pound of flank steak generously with salt and pepper on both sides. This will enhance its natural flavors.

2. 2

   Heat the Oil: In a large skillet over medium-high heat, add 2 tablespoons of olive oil. Let the oil heat for a minute until shimmering.

3. 3

   Cook the Steak: Add the seasoned flank steak into the skillet. Cook for about 4-5 minutes per side for medium-rare, or longer if you desire a more well-done steak. Transfer the cooked steak to a plate and let it rest for about 5 minutes before slicing.

4. 4

   Caramelize the Onions: In the same skillet, add the thinly sliced onion. Stir occasionally and cook for about 10-15 minutes, or until the onions are golden brown and caramelized. Season with salt to taste.

5. 5

   Slice the Steak: After resting, slice the flank steak against the grain into thin strips.

6. 6

   Assemble the Sandwich: Preheat your broiler. Cut the baguettes lengthwise and lay them on a baking sheet. Layer the sliced steak, followed by the caramelized onions, and top with 2 slices of provolone cheese on each baguette.

7. 7

   Bake: Place the baking sheet under the broiler for 2-3 minutes, or until the cheese is melted and bubbly.

8. 8

   Serve: Remove from the oven, close the baguettes, slice into manageable portions, and serve immediately.