Steak & blue cheese en croûte - Good Food Middle East

Ingredients

• 1 tbsp olive oil
• 800g piece of lean fillet steak (ask for a piece from the middle of the fillet with an even thickness)
• 25g butter
• 1 banana shallot, finely chopped
• 1 garlic clove, chopped
• 500g button mushrooms, very finely chopped in a food processor
• 2 tsp chopped soft-leaf thyme
• 12 slices prosciutto
• 50g Claxton blue cheese or Stilton, crumbled
• 25g walnuts, roughly chopped
• 500g pack all-butter puff pastry
• plain flour, for dusting
• 1 egg and 1 yolk, beaten
• seasonal vegetables, to serve
• 1 garlic cloves, chopped
• 150ml red wine
• 1 large thyme sprig
• 2 bay leaves
• 600ml beef stock
• 2 tbsp plain flour, mixed to a paste with 3 tbsp water
• seasonal vegetables