Cabbage Casserole

55 g butter
2 onions, chopped
1 stalk celery, chopped
2 cloves garlic, chopped
1/2 green capsicum chopped
2 tbsp white vinegar
1 medium head cabbage, cut into squares
1 can peeled tomatoes, with liquid
salt and pepper to taste
Melt butter in a large saucepan over medium heat. Add onion, celery, capsicum and garlic and saute for 3 to 5 minutes, or until translucent.
Add vinegar, then stir in cabbage, reduce heat to low, cook slowly until soft. Turn or stir the cabbage to prevent burning. Pour in tomatoes and season with salt and pepper to taste. Cover pan and cook over medium heat for 20 to 25 minutes, or until cabbage is tender.
Serve as a side dish, with slices of hot ham.