Combine ground pork, green onions, garlic, ginger, soy sauce, sesame oil, and black pepper until well combined.
Place about 2 teaspoons of filling into the center of a wonton wrapper/
Next dip your finger in water and wet the outside 1/4 inch of the wrapper all the way around.
While holding the wrapper, fold it in half over the filling. Then, starting at one edge, use your thumb and forefinger to make pleats about 1/4 inch apart.
Once you make one pleat, press down gently to seal the dough together, and move onto the next one. In the end you will have about 3 pleats from one end to the other.
Place the dumpling on a lined baking sheet, gently pressing down to flatten the bottom.
Once all of your dumplings are ready, if you have a bamboo steamer line it parchment paper (this one with holes works really well, or cut small squares for each dumpling).
Fill a large skillet with water, place the basket over the pan and bring to a boil.