Prepare the ingredients: pork neck, edible greens, butter, sugar, cooking wine, oyster sauce, tonkatsu sauce.

Make the sauce by mixing tonkatsu sauce, cooking wine, sugar, oyster sauce, and water.

Tenderize the pork neck using the back of a knife.

Season the pork neck with salt and pepper on both sides.

Heat a pan until it smokes and add the pork neck. Cook on high heat.

Flip the pork neck when juices start to appear on the surface. Continue cooking on high heat.

Reduce the heat to medium-low and add butter. Cook both sides in the butter.

Add the prepared sauce to the pan and simmer until it thickens. Adjust heat as needed.