No cook it rare so a good vet could bring it back to life,finely chopped mushrooms fine dice shallots cooked salt black pepper.set aside with the fillet allow to cool.a good homemade pate puff pastry. Best homemade,or a good all butter puff pastry. Chive pancakes.wrap the fillet using the pancakes coat the fillet in the mushroom mix and pate use egg to act as glue and colour. Make sure the beef is wrapped allow to cool and set in the fridge for at least half an hour.Cook.in a hot oven 180/200c check after about 10 minutes reduced the temp to 160-170.Make sure pastry is crisp,total cooking about 30 40 mins.allow to rest,serve with seasonal veg and roast spuds,and a rich red wine sauce.Not for the faint hearted but a true classic.
A tip before you start with the beef take from.the fridge about half an hour (room temp).