Mix the oregano and garlic powder with the tomato sauce and salt pepper.
Lay the slices of bread in a baking dish.
Sprinkle the olive oil over the slices of bread. Turn the slices of bread with the oiled side down.
Spread a thin layer of mayonnaise over each slice of bread, over the mayonnaise, tomato sauce and top with the ingredients of your preference to make the pizza to your liking.
Sprinkle Parmesan cheese over ingredients and until cheese melts about 10 minutes.