Cabbage in a casserole may seem strange but these flavours and textures really complement each other. The cabbage soaks up the juices making this into a full bodied dish.
1 Preheat the oven to 200°c (180°c fan), gas mark 6.
2 Place the leeks, celery, carrots, garlic, butter beans, thyme, sage, mustard powder and gluten free flour in a large casserole dish, and toss to coat the ingredients with the flour and mustard powder.
3 Add the tomatoes and stock and mix to combine then push in the cabbage wedges so that they are covered with stock and push the bay leaves down the sides.
4 Prick the sausages and lay on top of the casserole or tuck among the other ingredients if slow cooking.
5 Cover and cook in the centre of the oven for 1 hour, uncovering for the last 15 minutes if necessary to brown the sausages or alternatively slow cook for 6-8 hours.
6 Remove the bay leaves and season if needed before serving.