Brown ground beef thoroughly over med. heat. Drain fat off of meat, add drained can of green beans, and the mushroom soup. Cook over low-med. heat until heated all the way through.
I normally just serve this with some bread or biscuits. We buy most of our canned goods at dollar stores, or at grocery stores if there is a really good sale. If meat is too expensive, use less meat, and more green beans, and it's just as good if not better.