In a large bowl, combine the pork, watercress, water chestnuts, green onion, oyster sauce, sesame oil, garlic, soy sauce, ground white pepper and salt and mix together well.
Place 1/2 teaspoonful of this filling onto each dumpling skin.
Place 1 shrimp on the filling, slightly wet the edge of the dumpling skin, fold over and pinch with your fingers to form a seal all the way around.
To cook: Pan fry the dumplings in a large skillet over medium heat with oil for 15 minutes, turning over halfway through OR
Place them in a pot of boiling water for 10 minutes; drain and serve in hot chicken broth.
