Grandmas casserole. Under $10

I pkg hamburg/ turkey burger

I can tomato soup

Frozen/ canned / fresh green beans

Potatoes ( whatever your preference)

Shredded cheese/ American cheese slices 

Cook hamburg until done . Add tomato soup and green beans . Heat up until cooked . Meanwhile cook the potatoes and mash . Once that's done transfer hamburg mixture into a casserole dish . Top with mashed potatoes. Sprinkle chese ontop and bake at 350 until cheese is melted . About 10 minutes