Preheat the oven according to the crescent roll dough package instructions.

Roll out the crescent roll dough and separate into triangles.

Place a slice of roast beef and a slice of cheese on each triangle of dough.

Roll the dough around the filling, starting at the wide end, and place on a baking sheet.

Bake according to the package instructions until golden brown.

Prepare the Au Jus gravy as directed on the packet or using homemade instructions.