In a cast-iron skillet over medium heat, heat avocado oil. Once hot, add sliced sausages and cook until all sides are crispy. Then, using a spoon, transfer sausages to a plate. Set aside.
In same skillet, melt butter then add cabbage, onions, and spices. Cook until cabbage is lightly tender, about 5 minutes. Pour in apple cider vinegar then return sausage to skillet and stir.
Remove skillet from stovetop heat, garnish with pepper and parsley, then serve.
