Prepare the ingredients by shredding the cabbage leaves, dicing the green onions, grating the ginger and mincing the garlic.
In a large mixing bowl, combine the pork, shredded cabbage, diced green onions, soy sauce, grated ginger, minced garlic, sesame oil, and salt. Mix well until all the ingredients are combined.
Add approximately 1.5 teaspoons of the mixture to the center of the gyoza wrapper. Wet your fingers in water and gently moisten the outside edges of the wrapper. This will help the dumpling stick together.
Using your fingers, fold the dumpling in half over the mixture pushing the top together making a seal at the top but leaving the sides open. Then starting at one end of the dumpling, use your fingers to fold crimps into the wrapper pressing the two sides together to seal the dumpling. Repeat this process until the dumpling is completely sealed, making sure to work out any excess air as you make your way around the dumpling.
Heat around 1 tablespoon of vegetable oil in a skillet on medium heat. Once the oil is hot, place gyozas in the skillet in a single layer with flat side down.
Cook dumplings in oil until the bottom of the dumpling turns brown (3-4 minutes).
Then add 1/4 cup of water to the skillet, cover the skillet with a lid, and steam the gyozas for an additional 5 minutes. The water should be mostly evaporated when finished.
Remove the gyozas from the pan and place on a paper-towel lined plate to absorb any excess oil.
Serve and enjoy!