Tournedos “En Boite”

• 4 thickly cut tournedos
• 4 tablespoons butter
• 6 finely chopped shallots

Place well-trimmed tournedos in 4 individual heatproof casseroles with butter and finely chopped shallots, flavoured to taste with French mustard and Worcestershire sauce. Cover and cook for about 5 minutes; then drain fat; turn tournedos add 1 pinch each of rosemary, salt and freshly g