Brush one sheet of pastry with butter and place another sheet on top. Cut pastry into 2 halves lengthwise. Repeat using remaining sheets of pastry.
Combine egg, ricotta, parsley, Edgell Super Sweet Corn Kernels, John West Tuna Tempters and breadcrumbs in a medium bowl. Spoon the corn mixture evenly into the centre of each pastry square.
Brush pastry edges with remaining butter and fold pastry corners inwards to form a parcel. Place on a greased baking tray and brush with butter. Bake in a preheated oven at 200°C for 15- 20 minutes or until golden brown.