One of these things is NOT good for you but...
1 Can black beans.
1 Can diced tomatoes.
1 Can spaghetti in sauce.
1 Cup mixed frozen veggies.
It makes 1 meal for 2 or 2 meals for 1.
Note caned pasta has sugar and rather a lot of salt in it. To make this more healthy precook some low carb pasta and ad in some water then some tomato paste. This will ad a buck or so to the cost though. Where I live this is a good price for what you get. Skip the pasta and ad in 2 cans of beans also works well enough. I always rinse the beans off before I cook them. Dried beans lowers the cost but they need to be soaked over night.