I disagree. IMO you’re conflating edible stuff that originated in America with American food. Plants and animals that have their origins in the American continents have made their way around the world and been subsumed into other cuisines, e.g. turkey, tomatoes, potatoes, squash, corn and peppers.
American food as a cuisine are the dishes that have been created in America and are eaten by Americans and can be identified by non-Americans as stuff Americans eat.
I think I can answer this best through the immigrant lens of my mom. She’s an awesome Korean cook but she wanted her 2 American kids to fit in. Some of the “American” dishes she made for us growing up; this was way pre-internet days so I have no clue where she learned about these (maybe recipes from some of the packaged foods?):
Spaghetti with doctored jarred sauce (usually Ragu); she would add a pat of butter to it and no, she was not familiar with Marcella Hazan; she simply thought it would taste better
English muffin pizzas
Stella d’oro frosted biscuit thingys sliced in half with cream cheese/pineapple filling for parties (they were always a huge hit); definitely from a recipe on the packaging
Campbell’s soups were always in the pantry - chicken noodle or chicken with stars for me, cream of mushroom for my brother
Eggo waffles
Lender’s bagels
BIG American breakfasts for my brother; to this day, he still makes them for himself and calls them the “2-2-2” - 2 eggs, 2 sausages, 2 pieces of toast
American chop suey
Duncan Hines brownies
Giant burgers
Grilled cheese sandwiches
PB and fluff sandwiches for my lunch (I ate them nearly everyday in elementary school)
Oh, and we were the house that all the neighborhood boys would want to visit after school because we had unlimited snacks (we were 2 very skinny kids). We always had Doritos and Cheetos in the house.
Growing up, my Mom made Johnny Marzetti and I liked it for what it was (hey - I was a kid and it was an easy mac & meat dish she could fill us up with!). I still have her recipe, although I’ve not made it in years and years. It was of Midwest origin, so being East Coasters, I have no idea why she called it that.
But when my high school was serving what they called American Chop Suey and and it was made to be served by 10:30 a.m. for those who had 4th period lunch, I’d look at it by 7th period (1:15 or so) and gag and would get something else, even if it was one of their horrible sandwiches or a piece of fruit. (My high school’s food in the mid-1970s was mostly crap.) The elbow noodles had swollen so much in the sauce, the were half the size of my pinkie finger, and the noodles were total mush.
So - I’d eat my Mom’s recipe of Johnny Marzetti, but won’t go near anything called American Chop Suey (which I know some people make with tomato soup - so maybe my HS mixed tomato soup and tomato sauce?).
I grew up in northern NJ, and had to look up the difference between a New Jersey Sloppy Joe vs. what the rest of the country calls a Sloppy Joe. My family had what the rest of the country ate - I’ve NEVER heard of a NJ Sloppy Joe! I’d I have just called that a deli sandwich.
I have never heard of a New Jersey Sloppy Joe, and I grew up in Monmouth County. My elementary and high schools served “normal” sloppy joes. The NJ one sounds more like a Reuben.
My mother made “sloppy joes” in North Carolina in the 1960s and early 1970s (I don’t know after that, I left for college in 1973).
It was ground beef, tomato sauce or ketchup, maybe a can of tomato sauce, browned ground beef with very finely minced onions since my youngest brother wouldn’t eat anything with visible onions. Served on untoasted commercial hamburger buns.
I didn’t encounter American Chop Suey, named as such, until I moved to New England. Ground beef browned with onion and garlic, some oregano/pizza-like dry spices, add some frozen green/red/yellow bell peppers, then finish with a marinara sauce and elbow macaroni and grated “real” parmesan cheese, not the stuff in the green can.
It’s not bad, especially if you add “extra” marinara, lots of the frozen bell peppers, and don’t overcoook the ground beef, which can make it tough.
HTF did ground beef cooked in a vaguely Italian style tomato sauce with macaroni get to be called chop suey? I didn’t know about this until I met my to be wife. When she explained what she knew as chop suey, I thought WTF?
Interesting - my Mom never put cubes of mozz in with the rest of the Marzetti mix - I’m almost 100% sure it was grated and sprinkled on top like a baked ziti, but I’ll have to check her recipe when I get home.