01 - Whisk together flour, eggs, water, salt, baking powder, and 1 tablespoon oil in a mixing bowl until completely smooth. Let the batter rest for 10 minutes to allow proper hydration.
02 - Heat a non-stick skillet over medium heat with a splash of oil. Add ground pork or chicken, grated ginger, and soy sauce. Cook while breaking up the meat until no longer pink, approximately 3 to 4 minutes.
03 - Stir in grated carrot and shredded napa cabbage. Continue stir-frying for 2 to 3 minutes until vegetables soften. Add sesame oil, chopped scallions, and black pepper to taste. Remove from heat and set aside.
04 - Wipe the pan clean and return to medium heat with a light coating of oil. Pour one-quarter of the batter into the pan, swirling quickly to create a thin, even layer covering the bottom.
05 - When bubbles form and edges appear set, about 2 minutes, spread one-quarter of the meat filling and a drizzle of beaten egg over half the pancake. Fold the plain half over the filling and press gently.
06 - Cook for 2 minutes per side until golden brown and completely cooked through. Transfer to a serving plate and repeat with remaining batter and filling to make 4 stuffed pancakes total.
07 - Combine soy sauce, rice vinegar, sesame oil, and chili flakes in a small bowl. Stir until well blended.
08 - Cut each pancake into halves or quarters. Arrange on a platter and serve immediately with the dipping sauce on the side.