Step 1: Prepare the filling. In a large mixing bowl, combine the ground pork, finely chopped kimchi (ensure it's well-squeezed and dry), chopped yellow onion, minced garlic, grated ginger, 2 tablespoons soy sauce, 1 tablespoon sesame oil, gochujang (if using), sugar, and black pepper. Use your hands to thoroughly mix all ingredients until well combined. The mixture should be uniform and slightly sticky. This is the heart of your Kimchi Potstickers Recipe.
Step 2: Prepare your workspace for assembly. Have your dumpling wrappers, a small bowl of water, and a baking sheet lined with parchment paper ready. Keep the unused wrappers covered with a damp cloth to prevent them from drying out.
Step 3: Fill and fold the potstickers. Take one wrapper and place about 1-1.5 teaspoons of filling in the center. Dip your finger in water and moisten half of the wrapper's edge. Fold the wrapper in half to create a half-moon shape, pressing firmly to seal the edges. You can leave it as a simple half-moon, or create pleats along the sealed edge for a classic potsticker look. Ensure no air is trapped inside and the seal is tight to prevent bursting during cooking. Place the finished Kimchi Potstickers on the parchment-lined baking sheet, making sure they don't touch.
Step 4: Continue filling and folding until all the filling is used. If you're not cooking all the Kimchi Potstickers immediately, you can freeze them. Place the tray in the freezer until the potstickers are solid, then transfer them to an airtight container or a freezer bag. They can be cooked from frozen, adding a few extra minutes to the steaming time. Consider using Basics Glass Food Storage containers for easy organization.
Step 5: Cook the potstickers. Heat 2 tablespoons of vegetable oil in a large non-stick skillet over medium-high heat. Once hot, carefully arrange a single layer of Kimchi Potstickers in the pan, making sure not to overcrowd it. Cook for 2-3 minutes, or until the bottoms are golden brown and crispy.
Step 6: Steam the potstickers. Carefully pour 1/2 cup of water into the skillet. Immediately cover the skillet with a tight-fitting lid. Reduce the heat to medium-low and steam for 8-10 minutes, or until the wrappers are translucent and the filling is cooked through. The water should have evaporated by the end of this time.
Step 7: Serve. Remove the lid and let any remaining water evaporate, allowing the bottoms to re-crisp for another minute if desired. Transfer the cooked Kimchi Potstickers to a serving platter. Repeat with the remaining potstickers.
Step 8: Prepare the dipping sauce. In a small bowl, whisk together soy sauce, rice vinegar, sesame oil, sugar, gochugaru (if using), sliced green onion, and toasted sesame seeds. Serve alongside the hot Kimchi Potstickers. This dipping sauce complements the rich flavors of the Kimchi Potstickers Recipe beautifully.