Measure and prep all of your ingredients.
Prepare the noodles as per packaging. (Note 1)
In a medium sized pot, add the chicken stock, water, preserved radish and fried shallots. Turn the heat up to medium high and allow the pot to come to the boil.
Optional Step (to make a clear soup)
Add your mince meat into a large bowl and massage it with your fingers. Pour boiling water over the meat until it is completely covered. Use a spoon to break up the meat and release the scum from the mince. Carefully, pour the liquid out and repeat.
Add the pork mince and bring the stock back to the boil. Cook for 2 minutes and scoop up any scum that build up on the edge of the pot.
Add the fish sauce, salt, pepper, prawns and fish cakes. Cook for 1 - 2 minutes.
Add the noodles and cook them for a 1 - 2 minutes or until done.
Check the seasoning of your soup and adjust according to your taste. (Note 2)
Ladle the noodle soup into bowls.
Garnish with spring onions, coriander, chilli and fried shallots.
Serve with a wedge of lemon.