- 1 tbsp olive oil
- 200g/7oz beef fillet
- salt and freshly ground black pepper
- 1 tbsp wholegrain mustard
- 50g/2oz breadcrumbs
- 50g/2oz cashew nuts, roughly crushed
- 2 tbsp chopped fresh parsley
- 50g/2oz unsalted butter
- 1 tbsp olive oil
- ½ onion, finely chopped
- 1cm/½in piece fresh ginger, finely chopped
- 1 garlic clove, finely chopped
- 100g/3½oz wild mushrooms
- dash soy sauce
- 50ml/2fl oz double cream
- salt and freshly ground black pepper
- Preheat the oven to 200C/400F/Gas 6.
- For the beef with cashew crust, rub the beef all over with olive oil and season well with salt and freshly ground black pepper.
- Heat an ovenproof frying pan until hot and fry the beef for 2 minutes on each side. Spread the mustard over the top of the beef.
- Place the breadcrumbs, cashew nuts and parsley into a bowl and mix well. Press this mixture onto the mustard-covered beef, then transfer to the oven and bake for five minutes, or until the crust is golden-brown and the beef is cooked to your liking.
- For the wild mushroom sauce, heat the butter and oil in a frying pan and gently fry the onion, ginger and garlic until softened but not coloured.
- Add the wild mushrooms and soy sauce and cook until the mushrooms have softened. Add the cream, season, to taste, with salt and freshly ground black pepper and stir well.
- To serve, place the beef onto a plate and drizzle over the sauce.