Braised Red Cabbage and Frankfurters

• 1 small red cabbage
• 1 large onion
• 1 large cooking apple (optional)

Remove outside cabbage leaves and slice and chop the cabbage including the core. Peel and roughly chop the onion and cored apple. Put a lump of butter in a heavy pan over gentle heat, add vegetables and spoon them around for a minute till the butter is distributed throughout. Mix vinegar and brown sugar and pour over the cabbage.

Cover tightly and cook over very low heat until the cabba