Unfold the puff pastry and cut in half widthwise. Place both rectangles on a lightly greased cookie sheet.
Wash, core, and thinly slice the pears. Place in a bowl and gently toss with the brown sugar, salt, and walnuts.
Place pear slices in rows to fill both pastry sheets.
Bake at 400 degrees for 20 minutes.
Serve warm with Stilton, figs, and chilled red or white wine.