Next level roast beef - Good Food Middle East

Ingredients

• 2kg sirloin of beef joint , boneless, fat trimmed (leave a thin layer on), rolled and tied
• 4 anchovy fillets , chopped
• 4 garlic cloves , finely chopped
• 1 small shallot , finely chopped
• 2 tsp Dijon mustard
• 1 tsp Worcestershire sauce
• 1 tsp lemon juice
• ½ tsp sweet smoked paprika
• small handful of parsley , finely chopped
• small handful of tarragon , finely chopped
• 200g unsalted butter , softened