Take a small head of green cabbage and remove the core carefully with a sharp knife. Steam the cabbage for 10-15 minutes until tender and pliable. Unpeel the leaves and set to the side.
In a bowl, mix the pork, prawns, soy sauce, onions and garlic. Add the 5 spice and fennel seeds and mix until combined
Take a cabbage leaf and wrap about a tablespoon of the pork and prawn mixture. Secure with cooking twine.
Place dumplings in the steamer for 10 minutes, then finish in a hot pan with a tablespoon of olive oil for 2-3 minutes on each side or until crispy.