To make your dough, combine your plain flour or bread flour in a bowl with your egg. Gently stir in your water with chopsticks. Add more water if you think it's too dry!
Keep stirring until you get a shaggy dough. Then, begin to knead with your hand to form a dough ball. Roll the dough onto a clear surface and continue kneading for a couple more minutes.
Cover with cling film and set aside while you make the filling.
In another bowl, combine chicken or pork mince, ginger, garlic, water chestnuts, black pepper, oyster sauce, soy sauce, sesame oil, and sugar.
Give it a good mix until everything comes together to form a smooth paste. Set it aside.
Get your dough and pierce the dough in the middle to form a doughnut shape. Stretch out the doughnut and then slice it to then turn it into a long log.
Slice the dough sausage shape into 15 pieces of equal sized dough balls.
Flatten the pieces of dough with the palm of your hand, and use a small rolling pin to roll them into very thin circular wrappers. You can use a cookie cutter to make them perfectly circular, but that isn't necessary! Just make them really thin! Make sure they're floured well and then set them aside underneath a tea towel so they don't dry up.
Place a spoonful of your filling into the centre of your wrapper, and then gently press the filling down into the wrapper, using your thumb and index finger as a hold for the wrapper hole. You want the filling to meet the top of the wrapper and be a full dumpling.
Repeat this step for all dumplings, and set them aside underneath a tea towel.
Place the dumplings into your steamer and steam for 12-15 minutes depending on the size of your dumplings.
In a small bowl, combine your dipping sauce ingredients.
Serve up your dumplings and enjoy!