I start by mixing beef, ginger, scallions, salt, sugar, Sichuan peppercorn, and white pepper in a food processor. Then, I add egg, soy sauce, sesame oil, Shaoxing wine, and oyster sauce. Mixing by hand ensures the filling is sticky and flavorful.
Next, I stir in the chopped white onion and drizzle hot oil over scallion whites for extra aroma. Covering the mixture and refrigerating it helps the flavors meld and firms up the filling slightly for easier wrapping.
I combine flour with hot water, then gradually add room-temperature water and a pinch of salt. The dough is kneaded briefly, then left to rest for 30 minutes. This step makes the dough soft and easy to roll.
Once rested, I cut the dough into 50 g portions and roll each into a thin circle. I place a spoonful of filling in the center, carefully sealing the edges. Avoid letting the filling touch the edge for a perfect seal.
I heat oil in a skillet and place the pies in, pressing the center lightly. Cook each side until golden brown, then cover the pan and let the pies cook for another few minutes. Finally, I uncover to crisp both sides before serving.