Place beans, Parmesan cheese and salad dressing in food processor bowl with metal blade; process until smooth. Spread mixture in ungreased 9-inch microwave-safe pie pan or quiche dish.
Top with pepperoni, pepperoncini peppers, shredded Italian cheese blend and oregano. Cover with microwave-safe plastic wrap.
Microwave on HIGH for 1 1/2 to 2 minutes, turning pan once halfway through cooking. Serve with crisp crackers.