Melt 3 oz. butter in a large pan on medium-high heat and saute the cabbage until it starts to soften. Don't let it get brown!
Add spices and vinegar. Keep stirring the cabbage for a few more minutes. Remove the cabbage from the pan and put it in a bowl.
Melt the rest of the butter in the same frying pan. Add garlic, chili flakes and ginger and sauté for a few minutes.
Add ground meat and brown until the meat is cooked. Lower the heat to medium-low.
Add scallions and cabbage to the meat and stir. Add salt and pepper to taste. Top with the sesame oil before serving.
Add a small amount of wasabi paste to the mayonnaise until the taste is just right. Serve the stir-fry warm with a dollop of wasabi mayonnaise.