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Heat oven to 400°F.
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On a large baking sheet, lined with parchment, and sprayed lightly with cooking spray, arrange the crescent dough, separating the dough into triangles along the perforations:
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Lay the dough triangles, overlapping slightly at the corners, so that the short end of the triangles form a circle.
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Layer meats around the circle formed by the overlapping dough triangles.
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Spread a thin layer of olive salad over meat.
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Layer cheeses over olive salad.
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Gently fold the long end of each triangle over the filling to form the ring.
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Brush the dough lightly with egg wash and sprinkle with parmesan cheese.
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Bake at 400°F for 20 to 25 minutes until cheese is melted and crescent dough is toasty and browned.