Brown
the hamburger and onion together. Drain fat. Put in
the bottom of a casserole pan.
Spread
the bag of frozen corn on top of the hamburger mixture.
Spread the can of cream style corn on top of that.
Spread
the mashed potatoes on top of all. Bake for 1 hour,
until the tips of the potatoes are starting to turn
brown. You can add garlic salt or dried garlic to the
hamburger if you like.