Mary Berry's aubergine five-nut roast recipe is a reall winner for vegetarians. It's so easy to make and tastes delicious too - you can prepare it in advance or the day before you want to serve it so you've got plenty of time to focus on the sides. This recipe serves 8 people and will take around 1hr and 20 mins to make. This nut roast is ideal for vegetarians when it comes to your Sunday roast dinner or Christmas Day dinner with the whole family. Made with onion, celery and aubergine this…