This sandwich is a delicious and hearty option for lunch or dinner. The combination of flavors and textures makes for a unique and satisfying meal. The flank steak is thinly sliced and grilled to perfection, while the orange sections add a touch of freshness and a burst of flavor. The baby spinach provides a nutritional boost, and the blue cheese adds a creamy, tangy element. These sandwiches are easy to make and can be customized to your liking. You can also add your favorite condiments or extra toppings, such as sliced tomatoes or red onions. This recipe is perfect for a quick and easy weeknight meal or a casual get-together with friends. The flavors are sure to impress, and the sandwiches can be made ahead of time, making them a convenient option for busy days. Serve them with a side of your favorite chips or a simple green salad for a well-rounded and tasty meal.