Bubble and squeak

Method

1. Gently fry the onion in butter until translucent. Slightly increase the heat and add the mashed potatoes and chopped leftover vegetables.
2. Add chopped meat if using. Fry for at least 10 minutes, continuously turning to ensure the potatoes and vegetables are thoroughly re-heated. Aim to brown the outside edges without burning by occasionally pressing the mixture into the pan.
3. Give the vegetables a final press onto the base of the pan with a spatula and cook for 1 minute. Flip and repeat.
4. Season with salt and pepper to taste.