Ingredients:
Olive oil
Salt and pepper
2-3lb beef or venison fillet, trimmed
8oz cremini (chestnut) or wild mushrooms, finely diced
2 shallots, finely diced
1 clove garlic, minced
butter
1/2 cup dry white wine or brandy
2-3 sprigs fresh thyme, finely chopped
2-3 sprigs fresh parsley, finely chopped.
1 tbsp Dijon mustard
15 slices of prosciutto or serrano ham
1 package of puff pastry
Egg wash (1 egg plus a teaspoon of cold water)
Directions:
Heat a large skillet and add a glug of olive oil. Season the trimmed fillet with salt and pepper and sear each side until browned, about a minute a side, longer if you want your finished fillet to be cooked more than medium rare. Remove from heat, set aside.
Add butter to skillet and allow to melt. Add shallots and cook for a few minutes until softened. Add mushrooms and cook until liquid has evaporated. Add white wine and cook down until liquid is gone. Stir in the garlic and herbs, cooking for a minute. Remove from heat.
Unroll a large piece of plastic wrap, thick enough to wrap around the fillet. Lay out the prosciutto, slightly overlapping on the cling film. Spread the mushroom duxelle over the prosciutto leaving about an inch at the edges. Coat the fillet with the dijon mustard.
Place the fillet on top of the duxelle and prosciutto then use the plastic wrap to bring the prosciutto up and around the fillet. Roll the fillet up tight, twisting the plastic wrap at each end tightly to form an even cylinder. Pop in freezer while you prepare the pastry.
Roll out the pastry sheet so that it is large enough to enclose the fillet. Brush the edges with egg wash and wrap fillet up sealing the edges. Use any extra pastry to make a decorative topping for the wellington. Brush the pastry with egg wash and bake for 25 minutes at 200C/400F for medium rare and 30 minutes for medium. Allow to stand for ten minutes before carving.
Enjoy!