Hot and sour soup

Name: Hot and sour soup
Prep time: 5 min
Cook time: 20 min
Total time: 20 min
Yield: 3 portion
Ingredients: 500 g water; 75 g silken tofu; 10 g fresh bamboo shoots; 10 g dried shiitake mushrooms; 30 g pork tenderloin; 10 g carrots; ½ tsp dark soy sauce; ½ tsp salt; 1 tbsp potato starch; 1 tbsp water; 1 egg; 2 tbsp black rice vinegar; ½ tsp ground white pepper; 1 tsp sesame oil; 2 spring onions