Red Cabbage With Bramley Apple & Walnuts

Put the cabbage in a wide shallow pan with the butter, apple, bay leaf and cloves. Cook, stirring, until the cabbage starts to wilt. Add the vinegar (stand back and don't breathe in until the steam subsides), then continue to stir and cook until the vinegar has almost all disappeared. Add the sugar and stir until it has completely dissolved - be careful not to let it burn. Sprinkle with walnuts to serve. This will freeze well but let it thaw completely before gently reheating in a pan or microwave.