Preheat oven to 400℉
Place tomato slices on a parchment lined baking sheet
Top each tomato with a layer or parmesan and then a layer or mozzarella
Sprinkle the chopped basil on top of each tomato
Drizzle lightly with olive oil
Bake for 8-10 minutes or until cheese is melted and bubbly
Turn off oven and broil for 2-3 minutes to brown the cheese
Serve and enjoy!