Mix thoroughly 1/2 cup soup with all ingredients except cheese. On baking sheet, pat meat into 6 patties (4-inch) with 1-inch stand up rim. Bake at 450 degrees F. for 15 minutes. Spoon off fat.
Spread rest of soup on meat;top with cheese. Sprinkle with additional oregano. Top with green pepper rings, sliced mushrooms, or olives. Bake 5 minutes more. 6 servings.