In a small mixing bowl, beat together cream cheese, sour cream, oregano, garlic powder and red pepper. Spread evenly in a 9- or 10-inch quiche dish or pie plate. Spread pizza sauce over top. Sprinkle with pepperoni, green onion and green pepper.
Bake at 350 degrees F for 10 minutes. Top with cheese, bake 5 minutes more until cheese is melted, and mixture is thoroughly heated.