Five Spice Slow Cooker Pork with Noodles

Name: Five Spice Slow Cooker Pork with Noodles
Ingredients: 3 pounds trimmed pork shoulder; 1 teaspoon Chinese five-spice powder; 1 teaspoon kosher salt; 3 cups chicken broth; 1 cup dark soy sauce; 1/4 cup packed dark brown sugar; 2 tablespoons toasted sesame oil; 1/2 teaspoon crushed red pepper; 4 scallions, cut into 2-inch pieces; 1 garlic head, halved; 1 (2-inch) knob unpeeled fresh ginger, thinly sliced; 8 dried shiitake mushrooms, optional; Hot cooked Chinese egg noodles, for serving