BBC Food - Recipes - Chicken and leek pie

Ingredients

• 4 pieces chicken (thighs and legs)
• 8 peppercorns
• ½ onion
• 1 bay leaf
• milk (enough to cover chicken pieces)
• 6 rashers of smoked streaky bacon , cut into postage stamp-size pieces
• 30g/1oz butter
• 2 leeks , sliced into ½ inch discs
• 3 tbsp plain flour
• 3 tsp Dijon mustard
• 2 x 375g/13oz packs of puff pastry
• 1 egg , beaten, for glazing
• parmesan , grated, for topping