

This will serves about six to eight.
Pre-heat the oven to 400 (F)
Roll out the puff pastry to about a 10 x 14 inch size.
Cut in half to that there are two 5 x 14 pieces.
Place both pieces on a baking sheet, lined with parchment paper.
With a fork, press a 1/2 inch border along the edge of the pastry. Brush with the egg yolk mixed with 2 tabelspoons water. Then prick the rest of the pastry with a fork and place cook sheet in the middle of the oven. Bake for about 12 minutes.
Remove the pastry from the oven, increase temperature to 475°F.
Let the pastry rectangles cool slightly and gently press any large air pockets.
Scatter a thin layer of the sun-dried tomatoes on both rectangles followed by the Fontina cheese. Place the prosciutto strips on top. Sprinkle the top with the Parmigiano.
Bake until the cheese has melted, about 5 minutes. Let cool for a few minutes, then cut into strips or small squares to serve.
