Perfect with Sausages and Mash.
Cut the red onions in half then slice finely.
Cook in olive oil till they just start to turn a light brown.
Add some red wine,a little vegetable stock, balsamic vinegar and a spoonful of cranberry sauce if you have it.
Simmer until most of the liquid has been absorbed.
Put your sausages ontop of the mash and spoon over the sweet onions.