Preheat oven to 350 degrees.
Using a lightly-floured surface and rolling pin, expand puff pastry by half.
Cut salmon into three equal pieces. Form a circle on the bottom of half of pastry with salmon.
Fill hole with pate. Brush egg wash around outside of salmon on pastry. Fold unused side of pastry over top of salmon; seal edges with fork to press or crimp pastry together.
Place on a lightly-oiled sheet tray, brush top with egg wash and bake for 25-30 minutes, or until golden brown and internal temperature is 160 degrees.