hot and sour soup recipe

Ingredients**: - 4 cups chicken or vegetable broth - 1/2 cup sliced shiitake mushrooms - 1/2 cup bamboo shoots, thinly sliced - 1/4 cup rice vinegar - 2 tbsp soy sauce - 1 tbsp chili garlic sauce - 1 tsp freshly grated ginger - 1 tbsp cornstarch mixed with 2 tbsp water (for thickening) - 1 block firm tofu, cut into small cubes - 1 beaten egg - 2 green onions, sliced - 1/2 tsp white pepper - 1 tbsp sesame oil - Salt to taste