Brown and drain hamburger. Place hamburger in a 9x13 baking dish. Mix tomato soup with hamburger. Pour corn over hamburger mixture. Cover mixture with the mashed potatoes (leftover or freshly made is fine). Cover potato with cheese strips making sure to cover as much of it as you can.
Bake at 350 degrees Fahrenheit until cheese starts to bubble, approximately 30 minutes. Be careful not to burn the cheese.
We have a large family; this recipe can be cut in half to downsize it for a smaller family.
Be warned this recipe is even better as a leftover!