Place the stock into a large saucepan and heat until just simmering.
Next add the onions, chilli, garlic, fish sauce, sugar and a pinch of salt and pepper.
Simmer for 3 minutes.
Cut the turkey into very thin strips and add to the stock.
The turkey will cook almost straight away, and stir well.
Add the noodles and beansprouts and bring back to the simmer and turn off.
Roughly chop the herbs and add to the Pho along with the juice from the lime and serve straight away.
Serve a little soy sauce with the Pho along with extra lime, herbs and extra chilli.