Thaw the puff pastry according to package directions, usually about 30 minutes.
Preheat oven to 400 degrees F. Line a cookie sheet with parchment paper and unfold one of the pastry sheets.
Add leftovers on puff pastry about 1-2 inches apart. You should have 3 rows and 3 columns of leftovers which will make 9 pastries total. (If it's easier, you can mix leftovers in a bowl first and then add them to the puff pastry.)
Unfold the second pastry sheet and place it over the other one. Cut into 9 squares and score the tops of each one. No need to divide the squares. Leave everything intact.
Brush egg wash on each one to get that flaky crust. Bake for 25 minutes or until golden brown. Serve and enjoy!