Preheat your oven to 350°F (175°C). Gather your ingredients and arrange your workspace.

Place the flank steak between two sheets of plastic wrap and pound until about ½ inch thick. Season both sides with salt and pepper.

In a mixing bowl, combine spinach, ricotta cheese, Parmesan, breadcrumbs, garlic, basil, and parsley. Mix thoroughly.

Spread the filling over the pounded flank steak, leaving a 1-inch border. Roll the steak tightly and secure with toothpicks or twine.

Heat olive oil in an oven-safe skillet. Sear the rolled braciole for 3-4 minutes on each side until golden brown.

Pour marinara sauce over the braciole, cover, and bake for 30-35 minutes or until the internal temperature reaches 145°F (63°C).

Let the braciole rest for 5-10 minutes, then slice and serve on a bed of marinara.