Divide the dough into 8 equal pieces; shape each piece into a ball and place them on a parchment lined baking sheet leaving about 1" inch between them. Cover and rest for 15 minutes.
Shape each ball into a flattened round about 5" in diameter, brush the surface with some milk and place 1~2tbsp filling onto the center. Pull the dough over the filling, pinching 2 opposite edges together tightly, to seal in the filling. It should look like a dumpling. Place the buns on the parchment lined baking sheet, cover and set aside for 1 hour or until puffy.
Preheat the oven to 400°F.
Brush the buns with milk (or egg wash) and bake them for 15~20 minutes or until golden brown. Remove from the oven and allow to cool for 5~10 minutes before serving.