Bring a big pot of water to a boil over high heat adding 2 to 4 tablespoons of salt to make the water taste like the sea. Add the vinegar
, and then the cabbage and boil over high heat until the cabbage is wilted (don't overcook it - it should still have tooth), 2 to 3 minutes. Drain
, then toss in a bowl with the butter, oil, the parsley, chives
, and salt and pepper, to taste.