Spray 9 x 13 dish with oil. Blend remaining two brown gravy mix packets with two cups water. Pour approximately 2/3 cups mixture in bottom of 9 x 13. Place pieces of steak in dish. Pour the remaining brown gravy mixture over steak pieces. Cover well. Bake at 325 for 90 minutes or until for tender. Serve with mashed potatoes, rice, or favored pasta.