Preheat your oven to 375°F
On a large cutting board, pound the steak cuts with a meat mallet until they’re evenly thin
Heat olive oil over medium heat on a skillet or pan. Add spinach, sun-dried tomatoes, and garlic; sauté for about five minutes
Remove the pan from heat and stir in parmesan cheese
Spread the spinach mixture evenly onto one side of the flank steak
Roll up the steak tightly and secure it with kitchen twine or toothpicks
Season the outside of the stuffed flank steak with salt and pepper to taste
Heat an oven-safe skillet over high heat and add olive oil. Once hot, sear the stuffed flank steak until browned on all sides
Transfer the skillet to the oven for approximately 25 minutes or until the desired doneness is achieved
Allow it to rest for about five minutes before removing kitchen twine or toothpicks and slicing it into rounds
Garnish with fresh parsley leaves (optional) before serving