Hot and Sour Noodle Soup with Pork

Name: Hot and Sour Noodle Soup with Pork
Ingredients: 2 ounces rice-stick noodles (pad thai noodles); 1 tablespoon vegetable oil; 10 large shiitake mushrooms (about 4 ounces), stems discarded and caps thickly sliced; 1 large garlic clove, thinly sliced; 1 1/2 teaspoons finely grated fresh ginger; 4 1/2 cups chicken stock or low-sodium broth; 1/2 pound pork tenderloin, cut into 2-by- 1/2-inch strips; 1 1/2 tablespoons cider vinegar; 1 1/2 teaspoons soy sauce; 1 teaspoon chile-garlic sauce or hot sauce; 1 cup snow peas, thinly sliced lengthwise; 3 scallions, thinly sliced; 1/2 teaspoon cornstarch dissolved in 1 tablespoon cold water; 1 teaspoon Asian sesame oil; Salt