First, whisk together all dipping sauce ingredients in a small bowl. Set the sauce aside.
1 tablespoon soy sauce, ½ tablespoon rice vinegar, ½ teaspoon sesame oil, ½ teaspoon sesame seeds, ¼ teaspoon gochugaru, ½ green onion
Next, add all-purpose flour, potato starch, salt, and cold water to a bowl. Then whisk until combined.
¾ cup all-purpose flour, ½ teaspoon salt, 1 cup cold water or seafood stock, ¼ cup potato starch
Add the chopped seafood, beaten egg, and green onions. Stir until just combined.
1 egg, 2 cups chopped seafood, 4 green onions
Preheat some vegetable oil in a large pan over medium heat. Then pour all of the batter (to make one large pancake) or half of the batter (to make two small pancakes, recommended) into the pan. Add the chili slices on top and let the pancake brown.
1 red chili pepper, 2-4 tablespoons vegetable oil
Flip the pancake and let it brown from the other side. Add more vegetable oil if needed and slightly lift the pancake to distribute the oil underneath it.
Serve the pancake with other (side) dishes of your choice and enjoy it with the dipping sauce!