Watercress soup with blue cheese & cashew pastries recipe | Good Food

Ingredients

• 1 sheet ready-rolled puff pastry thawed, (half a 425g pack)
• milk to glaze
• 50g Danish blue cheese crumbled
• 50g cashew finely chopped
• 1 large onion finely chopped
• 25g butter
• 1 large potato peeled and cubed
• 450ml milk
• 600ml chicken stock
• 2 x bags watercress