Place the oil in a large skillet over medium heat. Sauté the onion until softened. Add the apple, cabbage and salt. Once the cabbage is softening, add the hot pepper flakes, balsamic vinegar and brown sugar. Continue to cook for another 3–5 minutes. Taste for seasoning and adjust as desired.
Makes a perfect accompaniment to our Roasted Pork Stuffed with Heirloom Apples recipe!