This spinach and feta flank steak is a delicious and flavorful dish that is perfect for a special occasion or a weeknight dinner. The flank steak is marinated in a mixture of olive oil, garlic, and herbs, then stuffed with a mixture of spinach and feta cheese. It is then rolled up and cooked to perfection on the grill or in the oven. The result is a tender and juicy steak with a burst of flavor from the spinach and feta filling.