Preheat oven to 375ºF (190ºC)
In a medium bowl, combine Ricotta, Mozzarella, olives and pepperoni; set aside. On a floured surface unfold crescent or pizza dough. Roll out to a 16 by 10” rectangle. Using a 4” round cookie cutter or a bowl, cut into 6 circles. Place approximately 2 tablespoons of cheese filling on half of each circle; top with a dab of tomato sauce or ketchup if desired. Lightly moisten the edges with water, fold dough over into a half circle and seal, pressing edges with fork times. Pierce vents into top of each calzone. Place on a greased baking sheet and bake for 20 minutes or until golden. Serve hot.