Chinese Wonton Soup (Huntun Tang)

Ingredients

• 200 g minced pork (preferably with some fat)
• 100 g raw prawns (finely chopped)
• 2 spring onions (finely chopped)
• 1 tbsp light soy sauce
• 1 tbsp Shaoxing wine
• 1 tsp sesame oil
• ½ tsp grated ginger
• ¼ tsp white pepper
• ½ tsp salt
• 1 egg white
• 30 wonton wrappers (thin square type)
• 1 litre chicken stock (preferably homemade)
• 2 slices fresh ginger
• 2 spring onions (lightly crushed)
• Finely sliced spring onions
• Fresh coriander leaves
• Chilli oil or black vinegar (optional)