Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  pound         ground beef -- lean
   2 1/2                crackers -- crushed
   2      tablespoons   onion -- finely chopped
   2      tablespoons   celery -- finely chopped
     1/2                egg -- (or yolk only)
     1/2  teaspoon      worcestershire sauce
     1/2  teaspoon      oregano
   3                    mushrooms -- sliced
                        pepperoni slices
     1/2  medium        tomato -- sliced
   2      tablespoons   green pepper -- chopped
     1/4  teaspoon      pepper -- freshly ground
     1/2  cup           mozzarella cheese -- shredded
     1/2  tablespoon    parmesan cheese -- grated

Preparation:

Combine ground beef, cracker crumbs, onion, celery, egg, sauce, spice and mix well. Use an 8" tinfoil pieplate or similar small pan (regular ground beef may need to be drained), pat beef mixture into a patty. Scatter mushrooms, pepperoni, tomato and green pepper over. Sprinkle with pepper and top with cheeses. Bake at 350F 20-25 min until meat is no longer pink.