Preheat oven to 350.
Cook pasta according to package and drain.
Heat olive oil over medium heat and saute ground turkey, onion, garlic, in a large skillet until meat is cooked. Drain.
Spray a 9 x 13 pan with cooking spray.
In a medium bowl mix cooked pasta, meat mixture, sauce, 1 cup of cheese, 16 pepperoni and Italian seasoning. Mix well.
Spread pasta mixture evenly in pan.
Top with remaining cheese, pepperoni, and olives. Cover with foil and bake for 20 minutes.
Uncover and bake an additional 10 minutes until heated through.
Cut into 12 equal servings.