Mix together chopped prawns, pork mince, ginger, spring onion, chopped chives, soy sauce, fish sauce, sesame oil and a little salt and pepper. Chill for 1 hour for flavours to meld, then make up dumplings as below.
Dumpling assembly
Brush dumpling wrappers with the thin egg wash.
Add 1 Tbsp of filling to the centre of each wrapper, then fold over and crimp into a sealed dumpling, according to your style (experiment with different shapes for each flavour).
Steam dumplings in a steamer basket or pot, lined with baking paper greased with a little sesame oil, until translucent and firm. Serve immediately with a dipping sauce of equal parts soy, Sriracha, sesame oil, citrus juice and sesame seeds.