Prep the Ingredients

1. Slice the Cabbage: Remove the outer leaves of the cabbage and slice it thinly. This will help it cook evenly and absorb all the flavors.
2. Slice the Onion and Apple: Thinly slice the onion and apple, and set them aside with the cabbage.

Add to the Slow Cooker

1. Layer the Vegetables and Apple: In your slow cooker, layer the sliced cabbage, onion, and apple.
2. Add the Liquid: Pour in the apple cider vinegar, brown sugar, and water (or vegetable broth). Sprinkle with salt, pepper, cinnamon, and cloves if using.
3. Mix to Combine: Stir everything gently to combine the flavors, ensuring the cabbage is well coated.

Cook the Cabbage

1. Set the Slow Cooker: Cover and cook on low for 4 hours, or until the cabbage is tender and the flavors have melded together.
2. Stir Occasionally: If you have time, stir the cabbage halfway through cooking, but it’s not necessary.