Food & Cooking Recipes Soups, Stews & Stocks Soup Recipes Hot and Sour Soup with Tofu 3.6 (164) Prep Time: 20 mins Total Time: 20 mins Servings: 4 In this Chinese soup recipe, an egg is stirred in at the end to form tiny ribbons. For more flavor, add a teaspoon of toasted sesame oil just before serving.Note: Be sure to drain the tofu thoroughly before adding it to the soup so it will soak up the flavor of the broth. Directions In a large (5-quart) pot, combine broth, soy sauce, crushed red pepper, and 2 cups water. Bring to a boil over medium heat. Add mushrooms; reduce heat, and simmer until tender, about 10 minutes. In a small bowl, whisk together 3 tablespoons vinegar and cornstarch. Add to pot; simmer, stirring, until soup is thickened, about 1 minute. Add egg through a slotted spoon, and stir to form ribbons. Stir in tofu. Remove from heat; let stand, covered, 1 minute. Put ginger in a small sieve, and squeeze to release juice into soup (discard solids). Taste; add remaining tablespoon vinegar, if desired. Serve sprinkled with scallions.