This is a tried and tested, no-fail recipe for Filipino Grilled Pork Belly Barbecue (Inihaw na Liempo). This has a secret ingredient that tenderizes the meat as it marinates.
Depending on the pork cut you are using, you can slice them into bite-size pieces if you will use skewers for grilling. If you are using pork belly, make sure that they are sliced in long thin strips.
Mix together all the marinade ingredients in a large glass bowl or dish. Place the pork pieces in the bowl and marinate for at least 4 hours, but preferably overnight for more flavor absorption.
Using a kitchen brush, baste with the ketchup mixture once they’re nearly done. Adding the basting sauce or glaze last will ensure the meat won’t burn or char too much.