My daughter is a philly cheese steak fanatic.  I found an easy and simple way to create this sandwich using the cooked and sliced grass fed roast beef.

At the ranch, we make grass fed flank steak often. Flank steak is best marinated which tenderizes this cut of meat.  

You can fire up the grill and make extra flank steak to refrigerate for meals throughout the week.  Flank steak is good hot or cold.