Open chicken mushroom bacon pie - Multix

Ingredients

• 2 sheets frozen puff pastry (defrosted)
• 1 beaten egg
• 4 chicken thigh fillets trimmed and cut in 2-3 cm squares
• 1 small onion finely diced
• 1 small leek washed finely diced
• 8 button mushrooms quartered
• 4 rashers of rind less streaky bacon
• 50g butter
• 1 tablespoon olive oil
• 2 tablespoons plain flour
• ½ cup milk
• 1 cup low salt chicken stock
• sea salt and freshly ground black pepper