The best cut of steak for Tagliata di Manzo is top sirloin or rump steak, also known as strip loin or sirloin steaks (New York Steak.) These cuts are ideal for this simple dish because they are flavorful and tender, making them perfect for a quick grilling session. If you prefer a more premium option, you could also use beef tenderloin for a slightly more luxurious version of the recipe. The key is to choose a good steak with a nice amount of marbling to ensure a juicy and flavorful result.