Preheat oven to 400°F. Coat oven-safe dish with non-stick cooking spray.
In medium mixing bowl, blend cream cheese, sour cream, garlic powder, Italian seasoning and salt. Spread mixture into bottom of prepared dish, smooth the top. Spoon pizza sauce over cream cheese mixture, smoothing out to the edges.
In small mixing bowl, toss mozzarella and parmesan cheeses until well combined. Sprinkle over the pizza sauce in an even layer. Sauce should be completely covered with cheese. Arrange pepperoni slices on top.
Bake for 18 to 20 minutes, until cheese is melted and golden brown. Remove from oven and sprinkle with parsley. Serve hot with pita chips.