A recipe for a spicy bowl of dan dan noodles that wakes up the taste buds

Name: A recipe for a spicy bowl of dan dan noodles that wakes up the taste buds
Cuisine: Asian
Ingredients: 1 teaspoon Sichuan peppercorns; 8 ounces ground pork; 4 tablespoons soy sauce, divided; 2 tablespoons plus 2 teaspoons minced fresh ginger (from one 2-inch piece), divided; ½ cup chicken stock or water; 3 tablespoons chili oil; 1 tablespoon black vinegar; 1 tablespoon minced garlic; 1 teaspoon sugar; ½ teaspoon red pepper flakes; 5 tablespoons natural creamy peanut butter; 12 ounces fresh, frozen or dried wheat; noodles, such as lo mein; 3 teaspoons vegetable oil; ½ cup loosely packed fresh cilantro leaves; 2 Persian cucumbers, cut into matchsticks; ⅓; cup finely chopped pickled mustard greens (zha cai); 6 scallions, sliced on the diagonal