This Spanish classic is the perfect accompaniment to any meat or fish dish.
1 large onion, thinly sliced
4 medium potatoes, such as maris piper or red king Edward, peeled and cut into 1cm slices
1 large green pepper, deseeded and thinly sliced
2 tbsp sherry vinegar
200ml olive oil
Salt and black pepper
1 Mix the onion, potatoes and pepper, season with the salt, pepper and vinegar.
2 Heat the olive oil in a large frying pan over a medium heat and add the vegetable mixture. Cook for about 20 minutes, turning over occasionally. The vegetables should be soft, but not too crispy.