Right, I tend to wing it a bit with this recipe.... goes a bit like this.
Throw the following in a blender:
garlic,
ginger,
red chilli,
coriander,
fish sauce,
lime leaves,
lemongrass,
lime juice.
All to taste.
Puree into a sort of paste and put to one side. (can omit coriander at this stage and add later chopped instead).
Then roughly chop some firm white fish (cod? monkfish? haddock? whatever you fancy really, should imagine would work with salmon as well), and green beans, and chuck into blender. Pulse until left with mixture that has chunks in it. Put into bowl and mix in the spicy stuff you blended earlier. Cover with cling film and put in fridge for however long you have (half an hour, over night, whatever).
Remove from fridge, form into small cakes and then shallow fry. Or deep fry I guess, but I never have done it that way.
Sorry, not terribly precise, you could look up recipe online if you feel more comfortable with measurements etc! Can add and remove ingredients as you see fit/depending on what you have in stock. Serve with chilli and lime dipping sauce.