The one thing that stands out in my mind was BAD and UGLY - what I now call "tuna slop." A lovely concoction of tuna mixed with cream of mushroom soup and a can of peas. A layer of that at the bottom of a meatloaf pan, then a layer of Ruffles potato chips (HAD to be Ruffles, nothing else would do), then another layer of tuna-peas-mushroom soup, Ruffles on top, and bake it. My grandfather loved it, so we had it at least every other week
To this day, though, I love macaroni and beef. Gram used to make it with just ground beef, a couple cans of tomato soup, a little sugar to reduce the acid, and elbow macaroni. My mom and I have turned it up a notch, adding a can of stewed tomatoes, finely chopped onion, and sometimes a can/bag of mixed veg (my MIL's idea).