Preheat your oven to 375°F (190°C).
Roll out the pie crust and place it in a pie dish.
Layer the sliced tomatoes evenly over the crust.
In a bowl, mix together the mozzarella, mayonnaise, and garlic powder.
Add chopped basil and season with salt and pepper.
Spread the cheese mixture over the tomatoes.
Drizzle with olive oil and balsamic vinegar.
Sprinkle grated Parmesan cheese on top.
Bake for 45 minutes or until the crust is golden brown.
Let it cool for a few minutes before slicing and serving.