Peel the prawns; simmer the heads and shells in the water for 15 minutes, then strain — this is the prawn stock. Cook the prawns themselves in salted water for 2 minutes, and set aside.
In a pot, soften the garlic in the oil, add the minced pork, and fry until it breaks into crumbs.
Stir in the annatto and flour, and fry for 1 minute.
Gradually pour in the prawn stock, stirring, into a smooth, thick, orange sauce. Season with fish sauce and pepper.
Cook or soak the rice noodles according to the package, drain, and pile onto a plate.
Pour the sauce over, and arrange the prawns, egg slices, pork rind chips, spring onion and fried garlic on top.
Serve with a lemon wedge; toss together before eating.
A Receptnaptár original recipe. Calories and protein are estimated.
Tips
The stock made from the prawn heads gives the sauce its flavour; don't skip it.
Also often topped with flakes of smoked fish (tinapa).