Mix cream cheese, sour cream, mayonnaise, 1 cup mozzarella cheese and 1/2 c. Parmesan cheese and place in a 9x13" ovenproof dish; top with pizza sauce.
Add 1 T. oil to skillet and saute pepperoni, onions, green pepper and mushrooms for 5 minutes; add to dish.
Add olives and ground beef and top with 1/2 c. Parmesan cheese and 1 c. mozzarella cheese.
Bake at 350 degrees for 20-35 minutes until golden around edges.
Serve with Tostitos or pita chips.