Ingredients

• Enough cooked turkey for 4 people

• 25g butter

• 2 bunches spring onions, finely sliced, dark green ends discarded.

• 150g chestnut mushrooms quartered

• 150g Shiitake Mushrooms halved or more chestnut if you can't buy Shiitake

• 1 tablespoon flour 

• 250ml milk

•  142ml carton double cream

• 2 tablespoons chopped fresh tarragon leaves

• 500g pack of ready rolled puff pastry

• 1 egg, beaten