Melt ghee over medium heat in large skillet. Throw in the sliced onions and sauté until translucent. Add the minced garlic and anchovy fillets and mix to break up the anchovies.
Then, add the cabbage and stir to distribute everything. Cover with a lid and lower heat to medium low and cook until softened to your liking. Once the cabbage is cooked to your specifications, add 1-2 tablespoons of apple cider vinegar and season with salt and pepper to taste.