spanish rice - 3 cups cooked rice + 1 can of walmart's hot dog chili sauce. Spiced just right, and if you use minute rice you can cook it over a candle in a pinch.
cream soup - 3/4 c water, 1 bouillon cube (or 1 tsp), whatever leftovers you can scrounge chopped fine, 3 TB nonfat instant dry milk (protein boost). Heat to a simmer, stir in 1/4 cup water shaken in a jar with either 1 heaping TB cornstarch, or 2 heaping TB flour until smooth. Stir it into the hot broth mixture, then stir until it thickens. Decrease the flour or cornstarch if you don't like it as thick (I like very thick soup). Good to use up bits and pieces, and the thickening makes it more satisfying.
fried rice, made with however many eggs you can find/spare and minced 'miscellaneous leftovers'.
omelettes will take just about any additions and still taste wonderful. Frittatta is very continental, but is still an omelet baked in a pan rather than wrapped around a filling.
crepes filled with minced whatever and thick gravy. ditto with tortillas, which are after all, similar pancakey like thingies.
cooked ramen stir fried like rice; or mixed with just about any sauce; or (calorie overload) mixed with mashed potatoes then fried in patties.
walmarts house brand rice & cheese with broccoli side dish; one envelope, made up with a one serving can or pouch of tuna (!!)to flavor it up and enhance the protein profile.
minced up meat of any species in really thick gravy, poured over rice, instant potatoes, biscuits, or noodles. my late husband called it slop but asked for it all the time. SOS (I like the army style best, cooked hamburger in country gravy, over toast with an egg on top!