To make the dough sift the flour into a mixing bowl, pour in the water and mix to a stiff dough. Knead for 5 minutes, then leave the dough in the mixing bowl covered with a damp cloth for 10 minutes.
To make the filling, coarsely chop the beef and mixed sprouts, add the spring onions, ginger, salt, Worcestershire sauce, sherry, stock and olive oil. Mix thoroughly.
To make the dumplings, roll out the dough into 2 long 'sausages' on a lightly floured surface.Cut each 'sausage' into 15 - 18 pieces. Flatten each piece with the palm of your hand, then use a rolling pin to roll out each piece into a pancake about 7.5cm in diameter.
To assemble the dumplings, place 1 tablespoon of the filling in the center of each pancake, fold the pancake firmly over the filling, press/pinch the edges firmly together to close the top.
Place the dumplings on the rack of a steamer, cover and steam vigorously for 20 minutes.