-Place the puff pastry on a sheet of parchment on your counter. Using a rolling pin, roll from top
to bottom to elongate dough (do not roll from side to side). Finished dough will be approximately
15" long.
-Spread the dough with a very thin layer of mustard. Arrange the cheese slices to cover. Layer
the ham on top of the cheese. Sprinkle the parmigiano over the ham.
-Tightly roll the dough from the long side. Wrap the roll in plastic wrap and chill for at least 30
minutes (this will make it easier to slice).
-To bake: Preheat your oven to 425 degrees fahrenheit. Line a baking sheet with parchment.
-Slice the roll into slices 1" thick. Arrange them on the baking sheet, at least 1" apart.
-Bake for 15 to 18 minutes, until the dough is golden and flaky and cooked through.