Traditionally a way to use up leftovers, bubble and squeak usually has mashed potato as its base. To this, add any vegetables you like – spring onions, cabbage, carrots, peas, leeks or whatever you prefer. Mix them together and season. Add chopped herbs if you like.
Fry the mixture in a pan, turning it over a couple of times to make sure the vegetables are hot and the outside is nicely browned.
Serve as it is, with mustard or ketchup, or with veggie sausages on the side.