Pork and prawn dumplings

Name: Pork and prawn dumplings
Ingredients: 125g/4oz minced pork; 125g/4oz raw tiger prawns, shelled, de-veined and roughly chopped; 1 large spring onion, finely chopped; 1 tbsp grated fresh root ginger; 1 tbsp light soy sauce; 1 tbsp shaoxing rice wine or dry sherry; 1 tsp toasted sesame oil; 2 tsp cornflour; Sea salt and freshly ground black pepper; 8-10 goji berries (optional); 10 ready-made wonton wrappers (available from asian grocers); Groundnut oil, for greasing; 1 tbsp chilli sauce; 2 tbsp light soy sauce