Hot and sour soup

#### Ingredients: - 4 cups chicken or vegetable broth - 1 cup sliced mushrooms (shiitake or button) - 1/2 cup bamboo shoots, julienned - 1/2 cup tofu, cut into small cubes - 2 tablespoons soy sauce - 1 tablespoon rice vinegar - 1 tablespoon cornstarch mixed with 2 tablespoons water - 1 egg, lightly beaten - 1 teaspoon ground white pepper (or black pepper) - 1 tablespoon chili paste or hot sauce (adjust to taste) - 2 tablespoons white vinegar - 2 tablespoons chopped green onions - 1 teaspoon sesame oil