Pour soy sauce and two sips of beer in a flat oven tray and stir briefly. Rub sambal and turmeric on the pork belly slices.Add some salt and pepper to the pork belly and place them in the soy/beer marinade. Let the pork rest for at least 30 minutes or even better let it marinade over night.
Put some oil in a frying pan and cook the pork belly brown and crisp in about 15 minutes. Flip the pork frequently while cooking for best results. When the belly is nice and crisp get them out of the pan and set aside.
Toss chopped onion and garlic in the same pan and stir briefly. Then add the ground coriander and cumin and let it simmer for a couple of minutes.
When the onion is translucent add the pork belly back in the pan and give them a swirl through the spicy mix. Add coconut milk and let simmer on low heat for 3 to 4 minutes. Keep stirring to prevent the coconut milk from splitting.