Mix cheese and chopped parsley with a fork.Cut the pastry sheet into 2 equal parts.Take the first half. Fold 1/4 of it in. Place the 1/2 of filling on this folded part.Fold the long sides in. At last, fold the bottom part and give it a square shape.
Take 1 tbsp of butter in a skillet over medium heat. Place the square pastry in it and cover the lid. Turn it over and cook the other side too. You could spread some more butter for better taste if you desire. Follow these steps for the other half.