Eat Leftovers, for lunch or the next night.
Cut the recipe in half if possible to make a smaller meal.
Freeze half of the meal for another day. I have kept food in the freezer for several weeks. As long as its sealed well it will heat up just fine either in the microwave or in a pot.
Also at our old duty station I had a friend who's husband was deployed with mine. We would get together once or twice a week for dinner at each others houses. Unfortunately I don't know anyone here yet, so doesn't work this time.