Make the stock by frying 50 to 60 prawn heads in a wok with some oil. Fry until you get a nice aroma and the prawn heads turn bright red.
Transfer the prawn heads and the accompanying oil into a slow cooker. You may wish to add a handful of ikan bilis as well. Fill the slow cooker with hot water and let it slow cook for 6 hours.
After 6 hours, strain the stock and add 8 ladles of the prawn stock to a pot. Bring the stock to a boil. Add a slab of 100g pork belly and braise for 15 minutes. Remove the pork belly from the pot after 15 minutes.