4 dozen Melba rounds
3/4 c. ketchup
2 oz. thinly sliced pepperoni
1 c. shredded Mozzarella cheese
Dried oregano leaves

Heat oven to 400 degrees. Spread rounds with ketchup, top with pepperoni slices. Sprinkle cheese and oregano over pepperoni. Bake on ungreased cookie sheet until cheese is melted. 3 to 5 minutes.