I make this thing with pasta and a can of Cream of Mushroom soup - just cook the pasta and stir in the can of soup, if I have an extra can of mushroom, I add that in, too - oh, and sometimes a scoop or two of cream cheese if I have it. I don't know what I would call it, lol - cause I don't bake it, so it's not exactly a casserole? It's just super easy, cheap and filling. Oh! and a bag of mixed veggies if I have it, too.
Cheesy quesadillas with tomato soup (kind of like grilled cheese and soup, but one time I didnt have sliced cheese, only shredded, so I put it in some tortillas, grilled them and gave it to them with soup)