Here is a simple recipe for Hot and Sour Soup:

Ingredients:

1 tablespoon vegetable oil
1 teaspoon minced garlic
1 teaspoon minced ginger
1/4 teaspoon red pepper flakes
2 tablespoons soy sauce
1/4 cup white vinegar
1/2 cup chicken broth
1/2 teaspoon sugar
2 tablespoons cornstarch
2 tablespoons cold water
1/2 pound cubed pork or chicken
1/2 cup sliced mushrooms
1/2 cup bamboo shoots
1/2 cup julienned carrots
1/2 cup bean sprouts
1/2 cup thinly sliced scallions
2 eggs, lightly beaten
Instructions:

Heat the oil in a large pot over medium-high heat. Add the garlic, ginger and red pepper flakes, and cook until fragrant, about 30 seconds.

Stir in the soy sauce, vinegar, chicken broth and sugar. Bring to a boil, then reduce heat and simmer for 10 minutes.

In a small bowl, mix together the cornstarch and cold water. Slowly add the cornstarch mixture to the soup, stirring constantly