Macaroni and Cheese are definitely on that list.
As for Native American foods, Succotash is right up there. Corn and Lima Beans.
A lot of our Southern Foods such as White Country Gravy and Biscuits.
BBQ from our western heritage. For Texas, it would be beef. For other parts of our country, it would be pork.
New England is known for their chowders. Clam, corn, oyster stew. Also clam bakes. Bounty from the sea.
The Pacific Northwest has salmon, octopus and potatoes.
The upper Midwest, cheese, dairy products. They also have a very large population of Scandinavian folks there, so foods from that part of the Globe.
Other parts of our country has German, Polish, Irish, Italians, just to name a few nationalities, so we have sauerkraut, globlinkis, Irish stew, pizza, pasta .
California? I have no explanation for that part of the country. Just that most of our farmed foods come from there. A lot of new food fads start there and move to other parts of the country.
A lot of our dishes came over on the Mayflower, thus a lot of recipes from England.
Canada has Poutine. Whatever that is. Western Canada is the farming and ranching areas. So I am better off leaving Canada to a native of that country to tell you what their foods are.
Anyone else care to jump in?