Roast fillet of beef rolled in herbs, mushrooms and prosciutto
By Matt Tebbutt From Saturday Kitchen Ingredients 50g/1¾oz unsalted butter 2 garlic cloves, minced 2 large Portobello mushrooms, sliced 20g/¾oz dried porcini, soaked in boiling water and chopped 1 tsp chopped fresh rosemary 1 tsp chopped fresh thyme leaves 1 tsp chopped fresh parsley leaves …