Traditionally, Italian cuisine in North America was based on Southern Italian (Neapolitan or Sicilian, mostly) recipes, modified by immigrants to take advantage of the bounty of relatively cheap meat & dairy products in North America. Traditional Southern Italian cuisine is far less meat based and definitely not smothered in nearly as much cheese as you find in the US and Canada. Over the last 30 years or so, however, Northern Italian cuisine has become quite popular in North America, most likely influenced by TV cooking shows, and is seen by some as "higher-class".
I would say primarily based on Southern Italian food, apart from lasagna and tortellini which are Emilian (North-Central Italy).
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