Preheat the oven to 450°F (220°C)
Score the fat on the pork belly with a sharp knife.
Pat the meat dry with a paper towel and season the meat on all sides with salt and pepper.
Place the meat on a baking sheet lined with tin foil or parchment paper.
Roast the pork for 30 minutes, until the fat is rendered and crisp on the top.
Reduce the oven temperature to 350°F and continue to roast the meat for 2 hours, until very tender and soft.
Remove the baking sheet from the oven, place the meat on a cutting board and cover with tin foil. Rest for 10 minutes. Then uncover the meat, slice and serve.