500ml vegetable stock
½ small Chinese leaf lettuce (about 100g), cut into 1cm slices
4 dried (and soaked for 10 minutes) or fresh shiitake mushrooms, sliced
1-2 tbsp each light soy sauce and rice vinegar, to taste
1 tsp toasted sesame oil, to taste
2 spring onions, finely sliced
For the wontons
150g pork, minced
150g medium prawns, shelled, de-veined and finely chopped
1 large spring onion, finely chopped
1.5cm piece fresh ginger, grated
1 tbsp light soy sauce
1 tbsp rice wine
1 tsp sesame oil
2 tsp cornflour
16 wonton wrappers