To prepare a pepper coated stuffed flank steak beef recipe, first you will need to prepare the meat. First, cut the beef into 12 inch (1.27 centimeters) thick slices. Then, slice the steak in half lengthwise, and then cut each half into 1/4 inch (.6 cm) cubes. Place the cubed steaks in the refrigerator to marinate for at least 4 hours. After the marinating time is up, preheat the oven to 450 degrees F (232 degrees C) and place the cut side down on the preheated oven rack. Bake for 1 hour and 15 minutes, or until the internal temperature reaches 145 degrees Fahrenheit (60 degrees Celsius).