Cut the thin pork belly slices into bite-sized pieces.
Slice the onion and green onion thinly.
Heat cooking oil in a pan and sauté the onion and green onion.
Add the thinly sliced pork belly and stir-fry over high heat.
Season with soy sauce, sugar, minced garlic, and pepper.
Place the stir-fried pork belly and vegetables on top of rice.
Finish by sprinkling sesame oil and sesame seeds.