Preparation
Preheat oven to 375 degrees. To make crust, combine margarine and egg whites. Add baking powder, salt and flour. Pat out on pizza pan coated with nonfat cooking spray. bake for 12 minutes or until golden brown. Cool.
To make toppings, combine sour cream, cream cheese, oregano, basil and cayenne pepper. Spread over cooled crust. Arrange vegetables over topping. Cuto into 12 pieces.