Fisherman's Roll

Directions

1. 1
   Pre-heat oven to 450 degrees.
2. 2
   Roll out the pastry into a thin oblong and place on a baking sheet.
3. 3
   Fry the onion in butter until it softens then add the mushrooms and cook for a further few minutes.
4. 4
   Add the tuna, egg, lemon juice and capers: season to taste.
5. 5
   Put the mixture on the center of the pastry, damp edges, and fold over, first the top and bottom and then the sides.
6. 6
   Press edges well together.
7. 7
   Score a couple of times across the top, brush with milk and place in the pre-heated oven for 15 minutes.
8. 8
   Reduce the oven temperature to 400 degrees and cook for a further 15 minutes.