1. Put the flour in a basin and pour boiling water into the noodles.
2. Let cool slightly, and form a smooth dough, let it rest for 20 minutes.
3. Prepare the potherb mustard and wash it.
4. Bring water to boil in the pot, add potherb mustard, blanch until it turns green, remove.
5. Finely chop potherb mustard and finely diced ginger for later use.
6. Mince pork, add light soy sauce and starch, mix well.
7. Heat oil in a pot and sauté the ginger.
8. Pour in the pork and stir-fry well.
9. Pour the potherb mustard and stir-fry evenly.
10. Add salt and pepper, stir-fry, and let cool as filling.
11. Divide the dough into several small doses, take a portion of the dough, roll it into a round piece, and wrap it in the filling.
12. Make a pie and dip it with black sesame seeds.
13. Spread oil in the pan, put in the pie, slowly sear over medium and low heat.
14. Bake until both sides are lightly yellowed and cooked thoroughly.
