Creating an amazing Italian Stuffed Flank Steak is straightforward when you follow these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Flank Steak: Place the flank steak on a cutting board. Using a sharp knife, butterfly the steak by cutting it horizontally, being careful not to cut all the way through.
3. Make the Filling: In a large mixing bowl, combine chopped spinach, sun-dried tomatoes, ricotta cheese, mozzarella cheese, Parmesan cheese, garlic, oregano, basil, salt, and pepper. Mix well until fully combined.
4. Stuff the Steak: Open the flank steak and spread the filling evenly over one side. Roll the steak tightly from the side with the filling and secure it with kitchen twine if desired.
5. Sear the Flank Steak: Heat a skillet over medium-high flame and add olive oil. Sear the rolled steak for about 4-5 minutes on each side until browned.
6. Transfer to Oven: Move the pan to the preheated oven and bake for 25-30 minutes or until the internal temperature reaches 145°F (63°C) for medium-rare.
7. Rest the Meat: Remove the steak from the oven. Let it rest for about 10 minutes before removing the twine and slicing.
8. Slice and Serve: Cut into 1-inch thick slices to showcase the beautiful filling and serve.

These instructions will guide you in creating a beautiful and flavorful Italian Stuffed Flank Steak that’s sure to impress!