Mushroom Leek Pie | Pampas

Ingredients

• 1 x 375g of Pampas Puff Pastry
• 30g butter
• 2 tbsp olive oil
• 2 leeks, finely chopped
• 1 tbsp CSR Caster Sugar
• 1 tbsp red wine vinegar
• 800g mixed mushrooms - oyster, button, Swiss, Pine (if available), roughly chopped
• 30g dried porcini mushrooms
• 1 tbsp green peppercorns in brine, drained
• 400ml red wine
• 3 sprigs parsley, finely chopped
• 1 tbsp White Wings plain flour
• 1 tbsp Dijon mustard
• salt
• 1 egg whisked with a little water