Gather Ingredients: Ensure all ingredients are ready for a smooth cooking process.
Prepare the Sauce: In a small bowl, mix chili crisp, soy sauce, dark soy sauce, soy paste, and tahini until smooth. Set aside.
Prepare the Garlic and Ginger Paste: Using a mortar and pestle, grind garlic, ginger, and a small amount of oil into a smooth paste.
Toast the Sichuan Peppercorns: Toast Sichuan peppercorns over low heat for 3-4 minutes until fragrant. Transfer to a mortar and use a pestle to grind them into a coarse powder.
Mix the Ground Pork: In a large mixing bowl, combine ground pork, garlic-ginger paste, ground Sichuan peppercorns, and salt and pepper to taste. If desired, stir in Shaoxing wine. Mix thoroughly until well combined.
Cook the Ground Pork: Heat a small amount of oil in a large wok. Add the ground pork and cook until browned. Stir in pickled mustard root, dark soy sauce, salt, and pepper. Cook for another 2-3 minutes until flavors are well combined and the pork develops a slightly crispy texture.
Cook the Noodles: Boil fresh noodles according to package instructions until al dente. Drain and set aside.
Assemble the Dan Dan Noodles: Divide the prepared sauce into serving bowls. Add a small amount of noodle water to dissolve the sauce. Place the cooked noodles, ground pork, and green onions in the bowls, and toss everything together until evenly coated.
Garnish and Serve: Add more cooked pork on top, and sprinkle with chopped green onions and sesame seeds. Serve immediately and enjoy your homemade Dan Dan Noodles!