Recipes: Chef john's hot and sour soup

Preparation:    Preparation time: 20 mins Cooking time: 30 mins Serving: 4 Ingredients: ¾ ounce dried shiitake mushrooms 2 tablespoons soy sauce, or more to taste ¼ cup seasoned rice vinegar 1 teaspoon ground white pepper, or to taste ¼ teaspoon sesame oil 3 tablespoons cornstarch, or as needed 3 tablespoons water, or...