Fillet of Beef with Wild Mushrooms, White Asparagus and Truffle Hollandaise

• 4 × 140g Beef fillets
• 25ml Vegetable oil
• 80ml

Preheat the oven to 180°C. Season the beef with salt and freshly ground pepper. Heat the vegetable oil until almost smoking in a heavy-based pan. Add the beef and cook for 3 min