Step 1

Combine first 7 ingredients in a medium bowl (ginger through black pepper) and stir to combine. Add pork belly, onion slices and green onion; stir well to coat evenly and let stand 10 minutes.

Step 2

To a large, heavy skillet over medium-high heat, add pork belly mixture; cook, stirring occasionally until cooked through and crispy at the edges, 12 to 15 minutes (let cook undisturbed for a few minutes at a time between stirring for the crispiest edges). Transfer to platter and garnish with sesame seeds and green onion if desired; serve.