A cast iron pan is best for roasting pork belly. According to relevant public information, the best cast iron grill pan for grilling pork belly is round or rectangular, with grooves designed to drain away grease and make the barbecue less greasy. This grill pan is very common in Korean households. , the bottom of the pan is thin, heats up quickly, and is easy to control the temperature, so it is best to use a cast iron pan for roasting pork belly.