Shepherds Pie

1 pound of hamburger
1 onion, chopped (optional)
salt and pepper
2 packages of dry brown gravy
2 cups shredded cheese
4 cups mashed potatoes (real or instant)
1 package frozen corn or other vegetables

Brown and drain hamburger. Add onions. Add salt and pepper to taste. Prepare gravy according to package. Add gravy to meat and 1 cup cheese. Spread meat mixture to the bottom of 13 x 9 pan. Spread corn over meat and spread mashed potatoes over pan. Sprinkle 1 cup of cheese over potatoes. Bake at 350 degrees for 35 to 45 minutes.