Made these tonight (I have the booklet) for dinner. I followed the dough recipe (wholemeal flour). For the filling I used1/2 onion,garlic,ginger,chicken thighs,coconut oil,broccoli,carrot,tamari sauce,Worcestershire sauce,sweet chilli sauce and white wine vinegar.
Very tasty! Will make fairly infrequently though just due to the time factor.
Served alongside rice noodles. Made 15 buns - had to cook in two batches.