1 x 375 g ready rolled Puff pastry sheet
1 small onion – chopped
50 g Lurpack butter
200 g spinach leaves – washed and drained and lightly torn into pieces if they are large.
75 g walnuts – chopped finely
Half a pack of Castello® Extra Creamy Danish Blue Cheese
Black pepper and a little grated nutmeg to season.
Beaten egg or a little milk for glazing