Chop your onions, apple, and cabbage;
Heat up your butter in the braising pot; add onions and sauté for about 5 minutes, until translucent.
Add cabbage, apple and spices (sugar, salt, pepper, allspice, clove, bay leaf, and if using juniper berries), apple cider and preserve if using; cover it up.
Braise the cabbage for approximately an hour. Mix it frequently to avoid burning and add more liquid as needed (you can add a little bit more apple cider, but at this stage mostly add water or vegetable stock). Make sure your cabbage is mostly submerged in liquid.
Chop bacon and fry up the pieces, until crispy.
Add apple cider vinegar to the cabbage; mix well and taste for seasoning. Adjust with salt and pepper as needed.
Transfer the cabbage to a serving dish, top with bacon and (optionally) with dill.