1 Tsp butter
1 onion, halved and thinly sliced
1 eating apple, halved, cored, and sliced
1/2 red cabbage, cored, quartered, and thinly sliced
1/2 cup water
2 Tsp cider vinegar
Melt the butter in a heavy bottomed pot. Cook the onion until it starts to soften (about 4-6 minutes). Stir in red cabbage and and apple. Season with pepper and cinnamon. Add vinegar, and water. Bring to a boil; reduce to a simmer, cover, and cook until cabbage is tender, 20 to 25 minutes.
This can be stored in the fridge and re-heated.