Preheat the oven to 400°F (200°C).

In a mixing bowl, combine flour, baking powder, and salt.

Cut in the cold butter until the mixture resembles coarse crumbs.

Stir in the milk until just combined.

Roll out the dough on a floured surface and cut into squares.

Place a spoonful of roast beef and cheese in the center of each square.

Fold the dough over the filling and seal the edges.

Place on a baking sheet and bake for 20-25 minutes until golden brown.

Serve warm with beef broth for dipping.