Step 1

Center the oven rack and preheat the oven to 350°F or 180°C., and grease a baking tray. Unfold one tube of the crescent roll dough, and lay it on the baking tray. Pinch perforations in the dough together to seal them. Layer on the ham, pepperoni, provolone, mozzarella, and pepperoncini. Top with the second roll of crescent dough, and pinch together the perforations.

Step 2

Brush the top dough with the olive oil, and then sprinkle on the parmesan and oregano. (If you are not going to bake this appetizer immediately, simply cover it and refrigerate for up to one day.)

Step 3

Bake in the preheated oven until the dough browns lightly, and the cheese melts, and the meats are hot -- about 35 minutes. Cool for at least 15 minutes before slicing into squares.