1 kg (2 lb) pork ribs or bones, 2 liters (2 quarts) water
3 tbsp oil, 6 shallots sliced, 4 cloves garlic
For the chili paste: 8 dried chilies soaked, 4 shallots, 2 cloves garlic, blended and fried in 3 tbsp oil until dark
To season: 1 tbsp rock sugar, 2 tbsp fish sauce, 1 tbsp light soy, salt
200 g (7 oz) yellow noodles and 200 g (7 oz) rice vermicelli
To top: water spinach (kangkung) blanched, bean sprouts, sliced boiled pork, half a hard-boiled egg, fried shallots
How to make it
Shallots (8 min): Fry the sliced shallots in the oil until golden; lift out and keep the oil.
Prawn base (10 min): Fry the prawn heads and shells in the shallot oil with the garlic, pressing, until deep red and toasty, 8 minutes.
Broth (1 hr): Add the pork ribs and water, simmer 1 hour. Poach the peeled prawns in it for 2 minutes along the way, then lift out and halve. Strain the broth, season with rock sugar, fish sauce, soy and salt, and stir in a spoon of chili paste.
Build (5 min): Blanch the noodles, greens and sprouts, put in bowls, add pork, prawns and egg, pour over the boiling broth and top with fried shallots and chili paste.
Tips
The more heads you fry, the better it is; freeze heads from other prawn dishes for this.