Lightly grease a large baking tray with butter/margarine. Punch the dough back to deflate it, then divide evenly into 8 buns. I usually do this by forming the dough into a circle and cutting a line from side to side, then up and down, then the two diagonals (like you might cut a cake). Roll each piece into a round ball and place onto the tray, spaced evenly. Cover with a tea towel and leave to rise again for 20 minutes. Preheat the oven 200C, 400F, gas mark 6. Bake the buns for 10-15 minutes, until they are lightly golden and risen. Transfer to a wire rack to cool fully while you make the filling.