I want to know the answer to the following question:
What ingredient is notably absent from a New Haven-style pizza when ordered plain?
All the background I'm provided with is that "A white clam pie is a well-known specialty of the restaurants on Wooster Street in the Little Italy section of New Haven, including Pepe's and Sally's Apizza (which opened in 1938).". Is that enough to answer the question?
Answer: no