Cook the bacon: In a large skillet, cook the chopped bacon over medium heat until crispy, about 5-7 minutes. Remove the bacon from the skillet and set it aside, leaving the rendered bacon fat in the pan.

Sauté the onion and garlic: Add the diced onion and minced garlic to the skillet with the bacon fat. Cook for 3-4 minutes, or until softened and fragrant.

Cook the cabbage: Add the chopped cabbage to the skillet and stir to coat it in the bacon fat. Season with salt and pepper. Cook for about 8-10 minutes, stirring occasionally, until the cabbage is tender and slightly browned.

Add bacon and butter: Stir the crispy bacon back into the skillet, along with the butter. If desired, add the apple cider vinegar for a tangy flavor boost. Stir until the butter is melted and everything is well combined.

Serve: Garnish with freshly chopped parsley and serve hot.