Soak the sausage casing in warm water while you get everything else ready.
Pound/Chop finely, garlic, ginger, galangal, lemongrass, lime leaves and white part of the spring onions.
Slice the green part of the spring onions into thin rounds.
Now, mix everything up in a large bowl thoroughly and let rest as discussed above.
When you're ready, get a piping bag, snip the end off, about an inch from the end and fill the bag with the sausage meat.
To make the sausages, slip the casing over the cut end of the piping bag and keep pulling the casing over as much as you can, gathering it back, concertina style.
Leave about 6 inches of the casing hanging, to allow you to tie it up at the end.
Start filling the casing with the sausage meat (yes, yes, it looks exactly like what's in your mind right now!).
Keep filling, topping up the piping bag as you go along.
Cut of the extra casing and tie off both ends.
Twist the whole length into portions about 4-6 inches long, making links.
At this stage, sausages are usually hung up and pricked with a sterile toothpick or something similar. I don't bother with the hanging up bit but I do prick the sausage skins.
Find air bubbles and prick them as you go along.
Cook them as you would regular sausages. Barbecue, grill or fry them.
Frying
Heat a frying pan or griddle on medium heat. Add a tiny amount of oil if you want although I don't bother.
Separate the sausages by cutting the links.
Add the sausages to the pan, don't overcrowd them, and fry them for 12-15 minutes, giving them about a minute or two all over. I just tend to roll them around every couple of minutes.