Cold Sichuan Noodles with Spinach and Peanuts Recipe

Name: Cold Sichuan Noodles with Spinach and Peanuts Recipe
Ingredients: 1 large bunch spinach, trimmed and washed (about 2 quarts spinach leaves); 1 tablespoon crushed red chilis, preferably Chinese; 2 teaspoons toasted and ground sichuan peppercorns, divided; 1/4 cup vegetable oil; 1 tablespoon toasted sesame seed oil; 1 tablespoon soy sauce; 2 tablespoons Chinkiang vinegar (see note); 1 tablespoon fermented chili broad bean paste; 2 teaspoons sugar; 12 ounces fresh wheat noodles (see note); 1/4 cup toasted peanuts, roughly chopped; 1/4 cup chopped pickled mustard root (see note); 2 small fresh red chilis, sliced; 1/4 cup sliced scallion greens