Another vote for breakfast for dinner! I do that often and Bake beans on toast (with a little mayo in the beans) the only way my kids eat them!
Toasted tuna or tomato and cheese, instant noodles with some frozen mixed veggies added, canned sardines or canned oysters on toast, fried rice made with leftover rice, egg and whatever veggies we have, veggie soups, marrow bones with toast, baked potatoes with jarred pasta sauce and cheese if we have, pancakes (crepes since we make them thin in SA) filled with minced beef, tuna mayo, swiss chard, stir fry veg or whatever else we have, pap and morogo (like swiss chard), pap and curried cabbage, sauerkraut with warm bread and butter, hotdogs or sausage rolls, gravy or relish with pap or toast etc etc. I could carry on all day lol!