Preheat your oven to 375°F (190°C).
Roll out the crescent roll dough onto a greased baking sheet.
Layer the sliced roast beef evenly over the dough.
Add the slices of provolone cheese on top of the roast beef.
In a small bowl, mix the beef broth, Worcestershire sauce, garlic powder, salt, and black pepper.
Carefully fold the dough over the filling to create a pocket.
Bake in the preheated oven for 15-20 minutes, or until golden brown.
Let the squares cool slightly, then slice into squares and serve with warm beef broth.