Preheat your oven to 375 degrees Fahrenheit and grease a baking sheet with nonstick spray.
Separate the biscuit dough into eight individual circular pieces.
Press each biscuit piece down until it measures four inches in diameter on a floured surface.
Place one half slice of provolone cheese onto the center of each flattened dough circle.
Layer one ounce of thinly sliced roast beef on top of the cheese slices.
Fold the dough edges toward the center, pinch the seams tightly to seal, and place seam-side down on the baking sheet.
Brush the tops of the biscuits with melted butter and bake for 15-20 minutes or until golden brown.
While the biscuits bake, heat the beef broth, Worcestershire sauce, and garlic powder in a small saucepan over medium heat until simmering.
Serve the warm biscuits immediately with the prepared au jus on the side for dipping.