Step 1

Chop napa cabbage finely and put it in a mixing bowl. Sprinkle 1 tsp salt and toss together; let it sit for 10 minutes. When the cabbage becomes lifeless, squeeze it out to get rid of moisture.

Step 2

Boil Korean sweet potato noodles according to the package directions, about 6-7 minutes. Rinse in cold water and drain well. Chop into small pieces.

Step 3

Put pork, cabbage, chives, leeks, and noodles in a large mixing bowl. Season with soy sauce, sweet rice wine, ginger, sesame oil, and pepper; mix well with your hand until all the ingredients are well incorporated.

Step 4

Put a heaping tablespoon of filling in the middle of wrapper, wet the edges of wrapper with water using your finger. Fold the wrapper in half and pinch the edges together. Bring the both ends toward the center. Pinch the ends together to complete.

Step 5

Put some filling in the middle of the wrapper and wet the edges with water using your finger. Bring one edge to the other and pinch in the center first, then make a small pleat on one side facing toward the center. Continue to make more pleats, usually about 4 pleats. Create the same number of pleats on the other side, facing the pleats toward the center.

Step 6

Bring a small amount of water in a large pot to boil. Make sure the bottom of your steamer doesn't touch the water. Place mandu without touching each other in a bamboo steamer (or regular steamer), lined with a cheese cloth or a steam liner. When the water boils, place the steamer over or in the pot. Cover and steam for 5 minutes. Serve immediately.

Step 7

Meanwhile, make dipping sauce to go with dumplings. Combine all the sauce ingredients and drizzle it over dumplings.