You need:
- a roll of shop-bought puff pastry
- membrillo (quince paste)
- a packet of grated medium cheddar
- one egg (beaten)
Preheat the oven at 200 degrees.
Cut the puff pastry into rectangles (4 cms width and 8 cms length) Put a little square of membrillo on top of the lower part of the rectangle. Cover the membrillo with grated cheese. Put the upper part of the rectangle on top of the membrillo and cheese so that you end up with a square. Use a fork to press down the sides so that the cheese does not 'escape' when you bake it. Paint the top of the squares with the beaten egg. Bake int the oven for around 22-25 mints until golden.
PS - you can make membrillo yourself in the Autumn when quinces are in season. This is our recipe: http://www.mumandsons.com/2011/10/quince-paste-membrillo.html