Ingredients

For the broth,
 
1) 2 white onions , chopped
 
2) 1 lb tilapia or catfish fillet
 
3) 1 (1-inch) piece fresh ginger , chopped
 
4) 5 cloves garlic , minced
 
5) 8 tablespoons vegetable oil
 
6) 3 teaspoons turmeric
 
7) 2 teaspoons paprika
 
8) 8 tablespoons rice flour (or chickpea flour)
 
9) 3 stalks lemongrass
 
10) 2 teaspoons dashi powder
 
11) 8 tablespoons fish sauce 
  
To assemble 
 
1) 1 lb rice noodles
 
2) 1 bunch cilantro , coarsely chopped
 
3) 3 hard-boiled eggs , halved
 
4) 2 limes , quartered
 
5) Crushed red pepper
 

Instructions

Cut about 2 inches (5cm) from the base of each lemongrass stalks and thinly slice those pieces.
Vigorously pound the remaining piece of each lemongrass stalk and cut each stalk into 3 inch (8cm) sections.
The thinly sliced lemongrass rings will be fried and the long sections will be used for the broth.
Prepare the broth by bringing 10 cups (2,5l) of water to a boil in a large saucepan with the dashi powder and 2 tablespoons of fish sauce.
Add the pounded lemongrass sections, and the fish fillets. Simmer for about 10 minutes until the fish is cooked through.
In a skillet, heat the oil over medium/high heat. When the oil is hot enough, add the chopped onion, garlic, ginger and thinly sliced lemongrass. Sauté for 3-4 minutes.
Reduce heat to medium. Add turmeric, paprika, 1 tablespoon of fish sauce and a pinch of salt. Cook over medium heat for about 5 minutes, stirring occasionally.
Meanwhile, remove the fillets from the pot. Using two forks, coarsely chop the fish as thinly as possible.
Add the fish to the mixture in the pan. Increase heat to medium/high, and cook the fish with the sauce for about 10 minutes, stirring vigorously and fairly regularly.
Place fish mixture into the broth and bring to a boil again.
Add the other 4 tablespoons of fish sauce. Add the rice flour and stir. Bring to a boil and let the broth simmer for about 15 minutes or until the broth has considerably thickened.
In each individual bowl, add noodles and cover with broth. Put half a boiled egg on top, and sprinkle cilantro and crushed pepper. Serve with a wedge of lime.

 
Knowledge and photo credit