My roomate is Vietnamese. Her friend's husband once remarked about having an "American Breakfast"--bread and cheese. That's what he understood we eat for breakfast here in the states. We were chuckling because, of course, an "American Breakfast" is bacon, eggs, hash browns, toast or biscuits, ham, pancakes, sausage, steak, etc. There's lots of options and some are regional, but bread and cheese, for the most part, aren't on that list.
For lunch, I'd maintain that the "submarine sandwich" is probably sufficiently American. Dinner, I'd probably go with simply prepared meat. I can't think of much for sauces for meat in "traditional" American cuisine except for barbecue.