Combine cream cheese, sour cream and oregano in bowl; stir until smooth. Spread cream cheese mixture evenly into 9-inch pie plate or quiche pan. Top with pizza sauce, Mozzarella cheese, peppers and onions. Sprinkle with Parmesan cheese.
Bake at 350 degrees Fahrenheit for 10 minutes, or until cheese is melted. Serve with whole wheat breadsticks or crackers.