method
1. Heat 25 g (1 oz) of the butter in a frying pan. Once it is foaming, add the beef and brown all over.
2. Place on a rack over a roasting tin and roast at 220°C (425°F) gas mark 7 for 20 minutes. Set aside to cool.
3. Soak the dried porcini mushrooms in 30 ml (2 tbsp) boiling water for 15 minutes.
4. Melt the remaining butter in a pan, add the shallots and fry for 2 minutes. Add the garlic, cook for 30 seconds, then stir in all the mushrooms and soaking liquid. Cook for 5 minutes until dry, then add the thyme, season to taste and let cool.
5. Roll out a quarter of the pastry to a rectangle 2.5 cm (1 inch) larger than the beef, and prick with a fork.
6. Bake at 220°C (425°F) gas mark 7 for 10-12 minutes until crisp and golden.
7. Allow to cool then trim to the size of the beef and place on a baking sheet.
8. Roll out the remaining pastry to a rectangle about 30 x 40 cm (12 x 16 inch). Cut a small square off each corner; keep the trimmings.
9. Place the meat on the cooked pastry rectangle. Season the beef and spread the mushroom mixture all over, then brush lightly with a little egg.
10. Wrap the uncooked pastry around the beef, tucking it under the pastry base. Refrigerate until ready to cook.
11. Make a slit in the top of the pastry and brush with beaten egg. Decorate with shapes cut from the pastry trimming; brush with egg.
12. Bake at 220°C (425°F) gas mark 7 for 35 minutes for medium rare beef or 40-45 minutes for medium.
13. Leave to stand for 10 minutes before serving. Garnish with thyme and serve with a thin gravy and vegetables of your choice.
serving amount
serves 8
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