Preheat the oven to 375°F (190°C).
Unroll the crescent roll dough and lay it flat in a greased baking pan.
Layer the salami, ham, provolone, and mozzarella over the dough.
Sprinkle the sliced pepperoncini and Italian seasoning over the cheeses.
Fold the edges of the crescent roll dough over the layers, pinching to seal.
Brush the top with the beaten egg for a golden finish.
Bake in the preheated oven for 20-25 minutes or until golden brown.
Allow to cool for a few minutes before slicing and serving.