Season: Remove the skin. Cut the pork belly into cubes. Place in a bowl, sprinkle with salt and pepper and rub to season all over.
Cook: Heat a large cast-iron skillet or heavy-bottomed pan on high heat (Note 1). Fry the pork cubes for 5 minutes on each side. When flipping, reduce the heat to medium-high. If the meat gets too brown, reduce heat to medium (Note 2). Remove the cubes with a slotted spoon. Then, carefully, discard the fat accumulated in the pan. (Be careful: a cast-iron pan is very hot and very heavy).
Sauce: While the meat cooks, make the sauce. Grate the ginger and the garlic, place in a small bowl. Add honey, soy sauce, cider vinegar, and chili. Stir well to combine.
Mix: Return the pork belly bites to the pan. Pour the sauce over them. Stir continuously for 2-3 minutes on medium-low heat until the pieces are glossy and coated and the sauce reduces.
Garnish: Serve immediately sprinkled with green onions.
Please don't add any oil to the pan; the pork will render its fat.